Example:nucleoside monophosphate (NMP)kinase(Section 9.4)catalyzes the following reaction: NMP kinase ATP NMP ADP+NDP NMP kinase transfers a phosphoryl group from ATP to NMP to form a nucleoside diphosphate(NDP)and ADP. 1.It is a transferase (group 2). 2.Transferases shifting a phosphoryl group are designated 2.7. 3.A phosphate is the acceptor,so that the transferase is designated 2.7.4. 4.The final number designates the acceptor more precisely.In regard to NMP kinase,a nucleoside monophosphate is the acceptor,and the enzyme's designation is EC 2.7.4.4.Example: nucleoside monophosphate (NMP) kinase (Section 9.4) catalyzes the following reaction: NMP kinase transfers a phosphoryl group from ATP to NMP to form a nucleoside diphosphate (NDP) and ADP. 1. It is a transferase (group 2). 2. Transferases shifting a phosphoryl group are designated 2.7. 3. A phosphate is the acceptor, so that the transferase is designated 2.7.4. 4. The final number designates the acceptor more precisely. In regard to NMP kinase, a nucleoside monophosphate is the acceptor, and the enzyme's designation is EC 2.7.4.4