Fox, S. W. (1936) Preparation of methionine-free natural leucine. Science, 84 (2172). p. 163. ISSN 0036-8075. doi:10.1126/science.84.2172.163. https://resolver.caltech.edu/CaltechAUTHORS:20200323-155035268
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Abstract
In a recent note in Science, Mueller pointed out that commercial I-leucine is contaminated with methionine. The presence of a sulfur-containing impurity was recognized by Emil Fischer in 1900. Unsuccessful attempts to purify natural I-leucine have included: the amino-acid ester method, repeated recrystallization from water, electrodialysis, precipitation of methionine as mercury complex and recrystallization from acidified butyl alcohol. Recrystallization of the formylated amino-acid has now been found, however, to yield a sulfur-free leucine without appreciable racemization.
| Item Type: | Article | ||||||
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| Additional Information: | © 1936 American Association for the Advancement of Science. | ||||||
| Issue or Number: | 2172 | ||||||
| DOI: | 10.1126/science.84.2172.163 | ||||||
| Record Number: | CaltechAUTHORS:20200323-155035268 | ||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20200323-155035268 | ||||||
| Official Citation: | Preparation of methionine-free natural leucine. S. W. Fox. Science 14 Aug 1936: 163; doi: 10.1126/science.84.2172.163 | ||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
| ID Code: | 102066 | ||||||
| Collection: | CaltechAUTHORS | ||||||
| Deposited By: | Tony Diaz | ||||||
| Deposited On: | 23 Mar 2020 23:06 | ||||||
| Last Modified: | 16 Nov 2021 18:08 |
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