Positive test controls include: HepG2, A-549. Immunogen sequence: CLGRALLRKS KILVLDEATA AVDLETDNLI QTTIQNEFAH CTVITIAHRL HTIMDSDKVM VLDNGKIIEC GSPEELLQIP GPFYFMAKEA GIENVNSTKF. This gene encodes the prototype of the membrane-associated guanylate kinase (