Gamma-amino methionine hydrolase

Gamma-amino methionine hydrolase is an fictional protein invented by Michael Crichton. It the novel it is found in the saliva of Procompsognathus.

Function
It is stated in the novel that is used as a genetic marker for Genetic manipulation.

The rest of it's function can be deduced from it's name. Methionine is associated with the start codon in RNA. Moreover, the -ase ending suggests the macromolecule is an enzyme. It then seemed logical that Crichton might use this as a genetic marker as it starts the production of proteins.