<n0:ComplexTerm xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:term-name>Protein Kinase Protein Phosphorylation</n0:term-name><n0:term-group>PT</n0:term-group><n0:term-source>NCI</n0:term-source></n0:ComplexTerm>
nci:P97
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Protein Kinase Protein Phosphorylation involves covalent linkage of a phosphate group (from a donor compound such as ATP) with a serine, threonine, or tyrosine residue of a Protein Kinase acceptor, often as a mechanism of kinase activity regulation.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>