- CheA has kinase activity and autophosphorylates itself on a histidyl residue when activated by the MCP . CheW is believed to be a transducer of the signal from the MCP to CheA . Activated CheA transfers its phosphoryl group to CheY, a response regulator.
- In step three, the primary amino group of agmatine attacks the C2 carbon of the p-C34 intermediate to release ?-Pi and form agm 2 C . TiaS also autophosphorylates its Thr18 with the ?-phosphate of ATP, releasing AMP and ?-Pi.