Positive test controls include: 293T, A-549, Mouse thymus, Rat testis. Immunogen sequence: LPVFMEQFSV PITMGGYSNA SPVQVKTAYK CACVLRDTIN PYLLRRMKSD VKMSLSLPDK NEQVLFCRLT DEQHKVYQNF VDSKEVYRIL NGEMQIFSGL I. This gene encodes a member of the GTP cyclohydrola