Source:http://linkedlifedata.com/resource/umls/id/C0022895
MSH: The genetic unit consisting of three structural genes, an operator and a regulatory gene. The regulatory gene controls the synthesis of the three structural genes: BETA-GALACTOSIDASE and beta-galactoside permease (involved with the metabolism of lactose), and beta-thiogalactoside acetyltransferase.,CSP: prokaryotic genetic unit consisting of three structural genes, an operator and a regulatory gene; the regulatory gene controls the synthesis of the three structural genes: beta-galactosidase and beta-galactoside permease (involved with the metabolism of lactose), and beta-thiogalactoside acetyltransferase.