NCIt definition : Human CYBB wild-type allele is located in the vicinity of Xp21.1 and is approximately
33 kb in length. This allele, which encodes cytochrome B-245 heavy chain protein,
is involved in the microbicidal oxidase system of phagocytes. Mutations in this gene
are associated with both atypical mycobacteriosis, familial, X-linked 2 and chronic
granulomatous disease, X-linked.;