| Human NMT was found to be phosphorylated by non receptor tyrosine kinase family members of Lyn , Fyn and Lck and dephosphorylated by the Ca ( 2+ ) / calmodulin dependent protein phosphatase , calcineurin . ^^^ A synthetic peptide corresponding to the amino terminal region encompassing tyrosine 100 of NMT served as a good substrate for the Lyn and Fyn kinases . ^^^ |