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PRP5: A helicase-like protein required for mRNA splicing in yeast

Dalbadie-McFarland, Gloria and Abelson, John (1990) PRP5: A helicase-like protein required for mRNA splicing in yeast. Proceedings of the National Academy of Sciences of the United States of America, 87 (5). pp. 1648-1652. ISSN 0027-8424. PMCID PMC54083. doi:10.1073/pnas.87.5.1648.

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Models of marine ecosystem productivity rely on estimates of small-scale interactions, particularly those between copepods and their algal food sources. Rothschild and Osborn [Rothschild, B. J. & Osborn, T. R. (1988) J. Plankton Res. 10, 465-474], hypothesized that small-scale turbulence in aquatic systems increases the perceived abundance of prey to predators. We tested this hypothesis by exposing the planktonic copepod Centropages hamatus to turbulent and nonturbulent environments at different prey concentrations. Our results fell into two main categories. First, the response to turbulence was characterized by an initial period having a high number of escape reactions. This period was followed by one of increased foraging. C. hamatus responded to the higher encounter rates due to turbulence as if it were experiencing altered prey concentrations. Second, the termination of turbulence resulted in an increased foraging response, which was not directly related to the encounter rate. Functional response curves do not adequately explain this foraging response because the time course of the foraging response depends on prior encounter experience and foraging motivation.

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Additional Information:© 1990 National Academy of Sciences. Contributed by John Abelson, March 5, 1990. We thank A. B. Sachs and R. Davis for communicating the SPB4 sequence prior to publication and D. Jamieson and J. Beggs for communicating unpublished results. We also thank S. Ruby, J. Arenas, and P. Fabrizio for discussions and critical reading of the manuscript and S. Horvath for oligonucleotide synthesis. G.D.-M. was supported by an American Cancer Society Fellowship. This work was also supported by National Institutes of Health Grant GM 32637 awarded to J.A.
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American Cancer SocietyUNSPECIFIED
NIHGM 32637
Issue or Number:5
PubMed Central ID:PMC54083
Record Number:CaltechAUTHORS:20150113-145846084
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Official Citation:Costello, J. H., Strickler, J. R., Marrasé, C., Trager, G., Zeller, R., & Freise, A. J. (1990). Grazing in a turbulent environment: behavioral response of a calanoid copepod, Centropages hamatus. Proceedings of the National Academy of Sciences, 87(5), 1648-1652.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53639
Deposited By: Jason Perez
Deposited On:14 Jan 2015 07:06
Last Modified:10 Nov 2021 20:04

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