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()Tj
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[(25)-146.2(m)]TJ
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[(\))-526(a)-18.1(nd)-526(me)-18.1(t)-4.3(h)-18.1(an)-18.1(e)]TJ
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()Tj
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(3m)Tj
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[(et)-343.3(al)20.7(.)]TJ
/F5 1 Tf
2.0677 0 TD
[(,)-349(1)0(9)20.8(8)0(8)20.8(;)-352.6(Et)19.5(io)20.7(pe)]TJ
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[(et)-337.6(al)20.7(.)]TJ
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[(,)-349(2)0(0)20.8(1)0(2)20.8(;)-346.8(Gr)14.2(ee)18.5(n-)]TJ
-18.3735 -1.1174 TD
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[(et)-297.2(al)20.7(.)]TJ
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[(,)-302.9(2)0(0)15.1(1)0(5)20.8(;)-300.7(Ko)20(nn)]TJ
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[(et)-291.5(al)14.9(.)]TJ
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[(,)-302.9(2)0(0)15.1(1)0(5)20.8(;)-300.7(Se)19.8(yf)15.1(ri)20.7(ed)]TJ
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[(et)-297.2(al)20.7(.)]TJ
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[(,)-323.7(2)-20.8(01)-20.8(5\))-20.8(.)]TJ
-20.1935 -1.1116 TD
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[(There)-556.2(is)-549.3(sturdy)-553.7(contextual)-556.3(and)-551.6(experimental)-555.1(evidence)]TJ
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[(to)-463.1(suppose)-469.3(that)-466.6(the)-465.4(hydrogen)-470.7(was,)-463.6(and)-465.2(is,)-466.3(generated)-469.7(still)]TJ
0 -1.1174 TD
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[(lesser)-486.7(degree,)-485.8(in)-486.1(the)-482.6(more)-484.8(recalcitrant)-491.8(orthopyroxene,)-486.7(by)]TJ
T*
[(water)-400.5(\(Coveney)]TJ
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[(,)-395.1(1987;)-397.3(McCollom)-405.1(and)-396.1(Bach,)-402.9(2009\),)]TJ
-9.0831 -1.1174 TD
[(with)-293.5(recent)-298.2(research)-295.4(possibly)-296.7(adding)-295.9(iron-rich)-293.5(spinels)-296.7(to)-290.3(the)]TJ
0 -1.1116 TD
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[(et)-297.2(al.)]TJ
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2.0562 0 TD
[(,)-297.2(2013\).)-296.9(It)-296(has)-298(also)-299.2(been)-294.7(argued)-296.9(that)]TJ
-9.6878 -1.1116 TD
[(a)-330.6(proportion)-333.8(of)-330.5(the)-332.9(hydrogen)-326.7(so)-330.3(released)-335.9(goes)-333.7(on)-330.5(to)-330.6(reduce)]TJ
T*
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0 -1.1174 TD
[(circulating)-471.1(uid,)-462.8(to)-463.1(methane)-467.6(in)-463.1(a)-468.8(mechanism)-465.1(akin)-466.5(to)-463.1(the)]TJ
0 -1.1116 TD
[(Sabatier)-329.2(reaction)-323.5(\(Horita)-326.7(and)-321.2(Berndt,)-329.1(1999;)-322.4(Neubeck)]TJ
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21.9618 0 TD
[(et)-320.3(al.)]TJ
/F5 1 Tf
2.0793 0 TD
(,)Tj
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[(2011;)-357(Wang)-359.2(and)-361.6(Gong,)-354.3(2011;)-362.7(Etiope)]TJ
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15.6491 0 TD
[(et)-354.8(al.)]TJ
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[(,)-360.5(2012\).)-354.5(Indeed,)]TJ
-17.7629 -1.1174 TD
[(multiple)-288.2(investigations)-283(to)-284.6(determine)-285.6(whether)-287.5(methane)-289(could)]TJ
0 -1.1116 TD
[(be)-492.9(generated)-492.7(through)-491.6(the)-488.4(reduction)-490.5(of)-491.7(CO)]TJ
7.3823 0 0 6.5614 240.6046 120.7559 Tm
(2)Tj
9.843 0 0 9.843 249.1653 122.3999 Tm
[(species)-489(have)]TJ
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[(been)-444.5(made)-445.7(and)-448(several)-443.1(showed)-446.2(that)-443.6(CO,)-445.3(CO)]TJ
7.3823 0 0 6.5614 249.5621 109.8141 Tm
(2)Tj
9.843 0 0 9.843 253.2472 111.4582 Tm
[(,)-441.2(o)0(r)-445.7(HCO)]TJ
7.3823 0 0 6.5614 293.329 109.8141 Tm
(3)Tj
/F10 1 Tf
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(-)Tj
/F5 1 Tf
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[(species)-650.3(can)-650.7(be)-648.4(reduced)-650.5(by)-647.3(ironnickel)-648.4(alloys)-647.2(to)-647.4(form)]TJ
0 -1.1116 TD
[(methane)-467.6(under)-473.2(low-temperature)-472.8(\()]TJ
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14.0594 0 TD
(<)Tj
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(200)Tj
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1.5033 0 TD
()Tj
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[(C\))-464(alkaline)-473.5(hydro-)]TJ
-16.5073 -1.1116 TD
[(thermal)-518.3(conditions)-513.5(\(Horita)-516.8(and)-517.1(Berndt,)-513.4(1999;)-512.5(Wang)-514.7(and)]TJ
0 -1.1174 TD
[(Gong,)-550.1(2011\).)-550.3(Certainly,)-552.7(reduction)-553.9(of)-549.3(such)-546.8(precursors)-554.3(to)]TJ
0 -1.1116 TD
[(methane,)-344.3(while)-341.9(facing)-337.3(substantial)-348.6(kinetic)-338.7(obstacles,)-345(is)-336.2(ther-)]TJ
25.504 67.9184 TD
[(modynamic)-9.1(ally)-714.3(favorable)-716.2(\(Shock,)-713.7(1992;)-719.8(Maden,)-714.9(2000;)]TJ
0 -1.1174 TD
(Lyons)Tj
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[(,)-331.7(2005;)-333.9(McCollom)-336(and)-332.8(Seewald,)-338(2007\).)]TJ
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[(Moreover,)-683.5(we)-683.9(were)-681.5(aware)-683.7(from)-679.5(the)-678.5(calculations)-686.3(of)]TJ
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[(Shock)-311.8(\(1992\))-306.1(that)-311.1(serpentinization)-316.4(reactions)-312.9(taking)-307.5(place)-308.6(in)]TJ
T*
[(off-ridge)-281.8(systems)-280.4(at)-280(moderate)-284.3(temperatures)-284.1(of)-278.6(120150)]TJ
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22.3937 0 TD
()Tj
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(are)Tj
-23.0676 -1.1174 TD
[(more)-375.4(favorable)-370.6(to)-370.9(the)-373.2(thermodynamic)-371.8(drive)-369.6(to)-371(CO)]TJ
7.3823 0 0 6.5614 519.6471 668.6927 Tm
(2)Tj
9.843 0 0 9.843 526.9605 670.3369 Tm
(reduc-)Tj
-21.7314 -1.1116 TD
[(tion)-269.6(than)-264.9(those)-265.8(at)-268.4(higher)-267.1(temperatureindeed,)-274.8(the)-263.8(lower)-272.6(the)]TJ
T*
[(better)-297.1(in)-284.6(terms)-290(of)-290.2(the)-292.6(Gibbs)-288.5(free)-294.6(energy)-291.1(though)-289(not)-285.7(in)-290.3(terms)]TJ
0 -1.1174 TD
[(of)-336.2(kinetics)-333.9(\(cf.,)-339.6(Herschy)]TJ
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10.2408 0 TD
[(et)-337.6(al.)]TJ
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2.0965 0 TD
[(,)-331.7(2014\).)]TJ
-11.3236 -1.1116 TD
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[(ha)13.9(s)-254.3(t)0(h)20.7(r)0(o)20.9(w)0(n)-250.7(w)0(h)20(a)0(t)-251.2(w)0(a)18.8(s)-254.3(a)-261.4(s)0(e)19.9(e)0(m)18.5(i)0(n)20.7(g)0(l)20.7(y)-260.3(st)20.9(ra)19.7(ig)20.7(ht)20.7(fo)15.1(rw)20(ar)19.7(d)-254.5(s)0(e)19.9(g)0(u)15.1(e)-255.7(fr)20.9(om)]TJ
0 -1.1174 TD
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0 -1.1116 TD
[(la)13.8(st)20.9(in)20.7(g)]TJ
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(>)Tj
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[(20)-382.3(we)18.8(ek)19.7(s,)-378.7(th)20.7(ey)-377.7(fa)19.7(il)14.8(ed)-377.7(to)-376.7(ob)20.8(se)19.9(rv)15.1(e)-388.2(t)0(h)20.7(e)-388.2(ge)19.7(ne)19.7(ra)13.9(ti)20.6(on)-376.6(of)]TJ
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[(me)18.4(th)15(an)19.7(e)-192.3(f)0(r)20.9(o)0(m)-182(C)0(O)]TJ
7.3823 0 0 6.5614 382.1101 581.0455 Tm
(2)Tj
9.843 0 0 9.843 385.7385 582.6896 Tm
-.02 Tc
[(,)-213.5(t)-20(hu)-20(s)-200.6(p)-20(la)-20(ci)-20(n)-5(g)-211.2(t)-20(h).7(e)-212.3(i)-20(de)-20(a)-208.8(o)-20(f)-200.7(m)-20(et)-20(ha)-20(no)-20(ge)-20(ne)-20(s)-5.9(i)-20(s)-200.7(a)-20(s)]TJ
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0 Tc
[()56.5()0(a)19.7(n)-617.4(ob)15.1(se)19.9(rv)20.9(ab)19.7(le)-614(ho)20.8(mo)19.6(lo)20.7(gu)20.8(e)-618.5(a)0(t)-614(h)0(y)20.8(d)0(r)20.9(o)0(t)20.7(h)0(e)13.9(r)0(m)19.6(a)0(l)-608.3(v)0(e)19.7(n)0(t)20.7(s)0(,)18.7()56.5()-617.4(a)0(n)19.7(d)]TJ
0 -1.1174 TD
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17.6938 0 TD
[(pa)20.8(ce)]TJ
/F5 1 Tf
2.35 0 TD
[(So)21(us)21(a)-480.3(a)0(n)19.7(d)]TJ
-20.0438 -1.1116 TD
[(Ma)13(rt)20.7(in)20.7(,)-337.5(2)0(0)20.8(1)0(4)20.8(\))0(.)-327(C)0(o)19.8(m)0(p)19.6(o)0(u)20.8(n)0(d)20.8(i)0(n)20.7(g)-335.2(th)20.7(e)-336.3(u)0(n)15.1(c)0(e)18.5(r)0(t)20.7(a)0(i)19.5(n)0(t)20.7(i)0(e)19.6(s)-335(re)13.9(ga)19.7(rd)20.9(in)20.7(g)-335.2(t)0(h)20.7(e)]TJ
T*
[(or)15.1(ig)20.7(in)20.7(al)-222.4(AV)19.1(T)-226.9(f)0(o)20.9(r)0(m)19.6(u)0(l)20.7(a)0(t)13.8(i)0(o)20.7(n)-225.7(is)-221(th)20.7(e)-226.9(s)0(u)15.3(g)0(g)20.8(e)0(s)19.9(t)0(i)20.6(o)0(n)-221.1(o)0(f)-215.3(W)0(i)18.4(n)0(d)20.8(m)0(a)18.4(n)]TJ
/F4 1 Tf
22.3361 0 TD
[(et)-216.6(al)15(.)]TJ
/F5 1 Tf
-22.3361 -1.1174 TD
[(\(2)15.1(00)20.8(7\))-290.2(th)20.7(at)-297.2(hy)20.8(dr)20.9(ot)20.7(he)19.7(rm)19.6(al)-297.2(fo)20.9(rm)19.6(at)19.5(e,)-293.7(ra)19.7(th)20.7(er)-297.1(th)20.7(an)-291.3(hy)15.1(dr)20.9(og)20.8(en)19.7(,)-302.9(w)0(a)18.8(s)]TJ
0 -1.1116 TD
[(an)-181.9(in)20.7(it)20.6(ia)19.6(l)-185.5(f)0(u)20.9(e)0(l)19.5(.)-187.7(Be)18.6(in)20.7(g)-185.4(t)0(h)15(u)0(s)-174.8(f)0(o)20.9(r)0(c)19.7(e)0(d)-176.2(t)0(o)-175.1(r)0(e)14(t)0(h)20.7(i)0(n)20.7(k)-185.4(ou)20.8(r)-185.4(a)0(s)19.9(s)0(u)15.3(m)0(p)19.6(t)0(i)20.6(o)0(n)20.8(s)-185.2(le)19.5(d)]TJ
T*
[(us)-341.8(to)-342.1(at)19.5(te)19.6(mp)19.6(t)-346.8(t)0(o)-342.1(m)0(a)18.4(k)0(e)-343.2(m)15(or)15.1(e)-347.8(s)0(e)19.9(n)0(s)15.3(e)-347.8(of)-342(th)20.7(e)-347.8(s)0(t)20.9(e)0(p)13.9(p)0(e)19.7(d)-346.7(tr)20.8(an)19.7(si)15.1(ti)20.6(on)20.8(s)]TJ
0 -1.1174 TD
[(fr)15.1(om)-302.9(m)15(i)0(n)15(e)0(r)19.7(a)0(l)-303(t)0(o)-301.8(l)0(i)20.6(f)0(e)19.7()0(l)20.7(i)0(f)20.7(e)-313.3(th)15(at)-303(st)20.9(il)20.6(l)-312.3(e)0(x)19.7(t)0(r)20.7(a)0(c)18.5(t)0(s)-301.6(i)0(t)14.8(s)-311.9(in)20.7(or)20.9(ga)19.7(ni)20.7(c)-313.3(c)0(o)19.7(m)0(-)]TJ
0 -1.1116 TD
[(po)15.1(ne)19.7(nt)20.7(s)-340.7(u)0(l)20.7(t)0(i)20.6(m)0(a)18.4(t)0(e)19.6(l)0(y)-330.6(f)0(r)20.9(o)0(m)-331.7(m)0(i)19.5(n)0(e)19.7(r)0(a)14(l)0(,)-327.2(w)0(h)20(i)0(l)20.6(e)-342.1(st)15.1(il)20.6(l)-341(b)0(e)19.7(i)0(n)20.7(g)-340.9(dr)20.9(iv)20.7(en)-331.7(by)]TJ
T*
[(re)14(do)20.8(x)-231.5(d)0(i)20.7(s)0(e)19.9(q)0(u)20.8(i)0(l)20.6(i)0(b)15(r)0(i)20.7(a)-232.6(\(L)19.7(ed)19.7(uc)19.7(,)-228.1(1)0(9)15.1(1)0(1)20.8(;)-231.6(Ni)19.8(ts)20.9(ch)19.7(ke)-222.2(an)19.7(d)-231.5(R)0(u)19.8(s)0(s)15.5(e)0(l)19.6(l)0(,)-217.8(2)0(0)20.8(0)0(9)15.1(,)]TJ
0 -1.1174 TD
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/F6 1 Tf
8.9663 0 0 8.9663 313.0582 434.7211 Tm
0 Tc
[(2.)-501.1(So)-338.7(What)-329.8(Were)-339.8(the)-328.3(First)-338.9(Fuels)-333.5(and)-331.9(Oxidants?)]TJ
/F5 1 Tf
9.843 0 0 9.843 323.0361 418.2802 Tm
[(Th)19.6(e)-353.6(o)0(r)20.9(i)0(g)20.7(i)0(n)20.7(a)0(l)-343.3(i)0(d)20.7(e)0(a)-344.3(t)0(h)20.7(a)0(t)-343.3(l)0(i)20.6(f)0(e)-343.2(e)0(m)18.5(e)0(r)19.7(g)0(e)19.7(d)-352.4(au)19.7(to)20.7(ge)19.7(ni)20.7(ca)18.5(ll)20.6(y)-352.4(i)0(n)20.7(t)0(o)-342.2(t)0(h)20.7(e)]TJ
-1.0137 -1.1116 TD
[(ve)13.9(ry)-537.8(r)21(st)-537.8(au)19.7(to)20.7(tr)20.7(op)15.1(hs)-537.7(ha)19.7(s)-548.1(a)-549.4(lo)20.7(ng)-537.9(pe)19.7(di)20.7(gr)20.9(ee)-540.2(\(T)19.7(ra)19.7(ub)20.8(e,)-541.3(18)20.8(67)20.8(;)]TJ
T*
[(Pf)15.3(ef)19.7(fe)19.7(r,)-246.4(18)20.8(77)20.8(;)-254.7(D)0(a)18.8(r)0(w)20(i)0(n)20.7(,)-256.9(C,)-241.7(in)-244.2(Da)18.8(rw)14.2(in)20.7(,)-251.1(F)0(,)-246.3(1)0(8)20.8(8)0(8)20.8(;)-254.7(Ha)18.8(ec)18.5(ke)19.7(l,)-246.6(18)20.8(92)20.8(;)]TJ
0 -1.1174 TD
[(Me)13(re)19.7(sc)19.9(hk)20.8(ow)20(sk)21(y,)-269.5(19)20.8(10)20.8(;)-277.7(L)0(e)18.5(d)0(u)15.1(c)0(,)-264.9(1)0(9)20.8(1)0(1)15.1(;)-277.7(Go)20(ld)20.7(sc)19.9(hm)19.6(id)20.7(t,)-269.6(19)20.8(52)20.8(\))19.8(a)]TJ
0 -1.1116 TD
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T*
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ET
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T*
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T*
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T*
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T*
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T*
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T*
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T*
(acceptors.)Tj
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T*
[(pr)20.9(op)20.8(os)21(e)-630.1(t)0(h)20.7(a)0(t)-619.8(m)0(e)18.4(t)0(h)15(a)0(n)19.7(e)-630.1(wa)18.8(s)-628.7(s)0(e)19.9(q)0(u)20.8(e)0(n)19.7(t)0(i)20.6(a)0(l)19.6(l)0(y)-624.4(o)0(x)20.8(i)0(d)20.7(i)0(z)19.5(e)0(d)-619.7()0(r)21(s)0(t)-618.4(t)0(o)]TJ
T*
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T*
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[(,)-337.5(2011\))-339.5(provides)-338.2(the)-344.4(molecule)-342.1(that,)]TJ
ET
q
381.713 0 0 274.62 114.009 202.904 cm
/Im1 Do
Q
BT
/F7 1 Tf
9.845 0 0 9.845 59.7543 186.1228 Tm
[(FIG.)-313.7(1.)]TJ
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[(Simplied)-316.6(reaction)-317(steps)-311.2(of)-312.9(the)-315.3(putative)-316(denitrifying)-313.2(methanotrophic)-312.7(acetogenesis)-322.9(model)-312.7(based)-312.3(on)-312.9(Nitschke)-316.5(and)]TJ
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[(Russell)-291.3(\(2013,)-284.7(gures)-288.9(35\).)-283.7(Methane)-293.6(is)-284.2(produced)-286.7(by)-289.9(hydrothermal)-286.4(leaching)-288.2(of)-289.9(cracked)-288(carbon)-284.7(material)-295.3(previously)-287.7(residing)]TJ
T*
[(in)-249.8(the)-246.2(crust.)-251.4(Hydrogen)-246(and)-246(formate)-252.5(are)-247.2(generated)-249.9(through)-249(the)-246.2(reduction)-247.7(of)-249.6(water)-250.2(during)-248(serpentinization.)-249.2(Hydrogen)-251.8(provides)]TJ
T*
[(electrons)-329.3(for)-325.5(the)-326.8(reduction)-322.6(of)-324.5(HCO)]TJ
7.3837 0 0 6.5625 201.2598 154.6015 Tm
(3)Tj
/F10 1 Tf
.4991 .9157 TD
(-)Tj
/F5 1 Tf
9.845 0 0 9.845 212.2015 156.1889 Tm
[(to)-324.6(HCOO)]TJ
/F10 1 Tf
7.3837 0 0 6.5625 250.9228 160.611 Tm
(-)Tj
/F5 1 Tf
9.845 0 0 9.845 255.0047 156.1889 Tm
[(.)-320.1(Formate)-327.2(disproportionates)-330.5(to)-324.6(CO)-326.3(and)-320.9(water)-330.8(as)-325.5(pH)-325.3(drops)-321.5(\(Keene,)-330.4(1993\).)]TJ
-19.8324 -1.0077 TD
[(The)-350.8(reduction)-351.4(of)-347.5(nitrate)-349.6(to)-347.7(NO)-343.4(\(Kampschreur)]TJ
/F4 1 Tf
19.1356 0 TD
[(et)-348.8(al.)]TJ
/F5 1 Tf
2.1076 0 TD
[(,)-348.9(2011\))-344.7(drives)-352.6(the)-344.1(putative)-350.5(oxidation)-350.4(of)-347.5(methane)-351.5(to)-347.7(methanol)-345.8(and)-349.6(the)]TJ
-21.2433 -1.0135 TD
[(hydrogenation)-505(of)-497.2(methylene)-503.4(to)-503.2(a)-497.4(methyl)-503.9(group.)-497.8(The)-500.5(methyl)-503.9(group)-500.2(reacts)-504.7(with)-500.4(the)-499.5(CO)-504.8(to)-497.4(produce)-504.5(activated)-503.6(acetate)]TJ
T*
(\(Chistoserdova)Tj
/F4 1 Tf
6.3632 0 TD
[(et)-297(al.)]TJ
/F5 1 Tf
2.0558 0 TD
[(,)-302.8(2009\).)-296.2(Although)-302.8(this)-297.8(denitrifying)-301.7(methanotrophic)-301.2(\(right)-300(hand\))-299.8(path)-299(to)-295.8(acetate)-306.8(looks)-298.6(complicated,)-302.8(the)]TJ
-8.419 -1.0077 TD
[(high)-390(electron)-386.1(mobilities)-387.2(\(tunneling)-385.9(and)-390(bifurcations\))-389.9(within)-381.6(semiconducting)-393.2(GR)-383.9(allow)-387.4(improvization)-391.4(toward)-388.2(the)-384.4(best,)-388.6(if)]TJ
0 -1.0135 TD
[(intricate,)-390.8(pathways)-391.1(and)-384.2(thereby)-389.5(long-range)-386.7(charge)-389.5(transport)-390.3(\()-81.6(Marcus,)-392.4(1964;)-385.2(Wander)]TJ
/F4 1 Tf
35.3632 0 TD
[(et)-383.4(al.)]TJ
/F5 1 Tf
2.1422 0 TD
[(,)-389.2(2007;)-385.2(Nitschke)-391.3(and)-384.2(Russell,)]TJ
-37.5054 -1.0135 TD
[(2009,)-278(2011,)-278(2013;)-281.5(Ruby)]TJ
/F4 1 Tf
10.0602 0 TD
[(et)-279.7(al.)]TJ
/F5 1 Tf
2.0385 0 TD
[(,)-279.8(2010;)-281.5(Ge)]TJ
3.8697 .0403 TD
()Tj
.3858 -.0403 TD
(nin)Tj
/F4 1 Tf
1.5606 0 TD
[(et)-279.7(al.)]TJ
/F5 1 Tf
2.0385 0 TD
[(,)-279.8(2012\).)-279(Water)-280.3(and)-280.6(heat)-277.1(are)-281.7(among)-277.9(the)-280.7(waste)-278.8(products.)-283.1(The)-276(active)-280.5(suldic)]TJ
-19.9534 -1.0135 TD
[(centers)-263.8(of)-255.4(metalloenzymes)-258.5(CODH)-260.8(\(carbon)-256.9(dioxide)-261.8(dehydrogenase\))-260.2(and)-257.5(ACS)-258(\(acetyl)-258.4(coenzyme)-255.6(synthase\))-264.5(are)-252.9(afne)-260.5(with)-258.5(the)]TJ
0 -1.0077 TD
[(structure)-310.9(of)-301.4(nickeliferous)-304.7(greigite)-310.2(\(Russell)-303.8(and)-303.6(Hall,)-303.4(2006;)-304.6(Cao)]TJ
/F4 1 Tf
25.9883 0 TD
[(et)-308.5(al.)]TJ
/F5 1 Tf
2.0673 0 TD
[(,)-302.8(2009;)-298.8(Nitschke)-310.7(and)-303.6(Russell,)-306.2(2013;)-298.8(Bassegoda)]TJ
/F4 1 Tf
19.4236 0 TD
[(et)-302.8(al.)]TJ
/F5 1 Tf
2.0616 0 TD
(,)Tj
-49.5408 -1.0135 TD
[(2014;)-304.6(Roldan)]TJ
/F4 1 Tf
5.7873 0 TD
[(et)-302.8(al.)]TJ
/F5 1 Tf
2.0616 0 TD
[(,)-302.8(2015\),)-302(whereas)-310.5(sMMO)-305.7(\(soluble)-303(methane)-305.5(monooxygenase\))-306.3(is)-307.2(a)-301.6(di-iron)-306.7(enzyme)-304.3(with)-304.6(similarities)-309.8(to)-301.6(the)]TJ
-7.8489 -1.0135 TD
[(structure)-322.4(of)-318.7(the)-315.3(more)-323(reduced)-321.4(form)-316.1(of)-318.7(GR,)-318.1(fougerite)-316.8(\(Fe)]TJ
7.3837 0 0 6.5625 286.6393 60.9449 Tm
(II)Tj
.668 -.9157 TD
(4)Tj
9.845 0 0 9.845 295.2566 56.5795 Tm
(Fe)Tj
7.3837 0 0 6.5625 305.1212 60.9449 Tm
(III)Tj
.9982 -.9157 TD
(2)Tj
9.845 0 0 9.845 316.1763 56.5795 Tm
(\(OH\))Tj
7.3837 0 0 6.5625 336.9259 54.9354 Tm
(12)Tj
9.845 0 0 9.845 344.296 56.5795 Tm
(CO)Tj
7.3837 0 0 6.5625 357.959 54.9354 Tm
(3)Tj
/F11 1 Tf
7.9702 0 0 7.9702 361.644 57.8834 Tm
()Tj
/F5 1 Tf
9.845 0 0 9.845 365.6125 56.5795 Tm
(3H)Tj
7.3837 0 0 6.5625 377.6314 54.9354 Tm
(2)Tj
9.845 0 0 9.845 381.3164 56.5795 Tm
[(O\))-319.5(\(Nitschke)]TJ
/F4 1 Tf
5.5858 0 TD
[(et)-314.3(al.)]TJ
/F5 1 Tf
2.3898 0 TD
[(2013\).)-319.3(GR,)-318.1(green)-318.3(rust.)]TJ
/F6 1 Tf
8.9663 0 0 8.9663 59.7543 749.7069 Tm
[(METHANE:)-342.4(FUEL)-334.5(OR)-334.6(EXHAUST)-336.6(AT)-330.9(THE)-335.2(EMERGENCE)-339.9(OF)-331.2(LIFE?)-21687(1055)]TJ
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