the chromatographic behaviour of tdt may be regulated by phosphorylation-dephosphorylation , the 0.3 m salt peak can be converted to the 0.4 m salt species by treatment with protein kinase and atp , and the 0.4 m species can be converted to the 0.3 m form by exposure to alkaline phosphatase .
C0031715
phosphorylation
C0033640
protein kinase