Glutamine synthetase is a
Ligases are enzymes that link two substrate together,usually with the simultaneous hydrolysis of ATP. Glutamine synthetase catalyses the amidation of glutamic acid to glutamine.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 49 and 224
Isomerase
Ligase
Lyase
Transferase
Metabolism of protein and amino acid