L-alanine and its peptides (L-Ala-2–6) do not attract or repulse Tetrahymena in a 10−8M concentration. In 10−10M concentration there is a consistent repellent effect. Twenty four hours after L-alanine or L-alanine-peptides' pretreatment (imprinting) the progeny generation of the cells react differently to the same materials. L-Alanine, L-alanine penta- and hexapeptide in both concentrations are chemoattractant, while L-alanine tetrapeptide is repellent. L-Alanine dipeptide is inert in 10−10M and repellent at 10−8M concentrations, while L-alanine tripeptide is strongly repellent at 10−10M and attractant at 10−8M concentrations. This means, that the first encounter (imprinting) with an exogeneous amino acid or peptide is decisive to the later reaction of the protozoan cell. The chain length is important in the imprinting, however the reaction is not consistent. The experiments call the attention to the significance of imprinting in the receptor and hormone evolution.
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Research Article|
August 01 1995
Effects of L-alanine and L-alanine peptides on the chemotaxis of tetrahymena: Evolutionary conclusions
G. Csaba;
G. Csaba
1Department of Biology, Semmelweis University of Medicine, H-1445 Budapest, POB 370, Hungary
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L. Kôhidai
L. Kôhidai
1Department of Biology, Semmelweis University of Medicine, H-1445 Budapest, POB 370, Hungary
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Publisher: Portland Press Ltd
Received:
March 02 1995
Accepted:
July 10 1995
Online ISSN: 1573-4935
Print ISSN: 0144-8463
© 1995 Plenum Publishing Corporation
1995
Biosci Rep (1995) 15 (4): 185–190.
Article history
Received:
March 02 1995
Accepted:
July 10 1995
Citation
G. Csaba, L. Kôhidai; Effects of L-alanine and L-alanine peptides on the chemotaxis of tetrahymena: Evolutionary conclusions. Biosci Rep 1 August 1995; 15 (4): 185–190. doi: https://doi.org/10.1007/BF01540452
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