the mgatp binding site of adenylate kinase , located by a combination of nmr and x-ray diffraction , is near three protein segments , five to seven amino acids in length , that are homologous in sequence to segments found in other nucleotide-binding phosphotransferases , such as myosin and f1-atpase , ras p21 and transducin gtpases , and camp-dependent and src protein kinases , suggesting equivalent mechanistic roles of these segments in all of these proteins .
C0031727
phosphotransferases
C0282625
src