present in very small amounts in tissues, but believed to be important in systems that regulate growth control and is therefore of interest in studies of malignancy. The src gene product (pp60(src)) was one of the first kinases shown to phosphorylate at a tyrosine residue.
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... I do mean – tides ), you should draw the conclusion you’ve already hinted at. That ignores such things as phosphoserine and phosphothreonine or phosphotyrosine, but those are really modified amino acids.
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