pubmed-article:2946116 | pubmed:abstractText | The natural mammalian phagocytosis stimulator tetrapeptide tuftsin stimulated also the phagocytosis of the unicellular Tetrahymena. The selectivity of the Tetrahymena was not complete, as threonin-free tuftsin provoked a greater response. Treatment with tuftsin did not develop functional imprinting, however the binding capacity of cell membrane significantly increased after the first treatment. | lld:pubmed |