d.128.1.1 55932 Glutamine synthetase catalytic domain        
d.128.1.2 55935 Guanido kinase catalytic domain        
d.128.1.3 111160 Glutamate-cysteine ligase family 2 (GCS2)       
d.128.1.4 118090 Glutamate-cysteine ligase          
d.128.1.5 143812 GatB/GatE catalytic domain-like