Effects of hormones on chemotaxis in Tetrahymena: investigations on receptor memory.

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The peptide type hormones such as insulin and adenocorticotropic hormone (ACTH) have a positive chemoattractant effect on Tetrahymena. Non-hormone protein-sulphate provoked negative chemoattraction. Of the amino acid type hormones, serotonin produced negative, and the histamine and di-iodotyrosine induced positive chemotactic effects. The first encounter with these molecules may modify the chemotactic behaviour of the progeny cells. In a significant number of cases there was a different response after repeated encounters of cells and hormones.

Original languageEnglish
Pages (from-to)75-85
Number of pages11
Issue number311
Publication statusPublished - 1994


ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)

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