The cagA gene codes for one of the major H. pylori virulence proteins. Bacterial strains with the cagA gene are associated with an ability to cause ulcers. The cagA gene codes for a relatively long (1186-amino acid) protein.
The definition of implicit is, âimplied or understood though not plainly or directly expressed.â Something is, therefore, implicit when it is not directly stated but is either suggested in the wording or necessary to effectuate the purpose. For example, There is a morality implicit in his writings.
1 Implied or understood though not directly expressed: an implicit agreement not to raise the touchy subject.  Contained in the nature of something though not readily apparent: âFrustration is implicit in any attempt to express the deepest selfâ (Patricia Hampl).