Positive test controls include: 293T, PC-12, BxPC-3, SH-SY5Y, Mouse brain. Immunogen sequence: EEENELTLNE KNFFPEYNYD WWEKKPFSED VNWGYEKRNL ARVPKLDLKR QYDRVAQLDQ LLHYRKKSAE FPDFYDSEEP VSTHQEAENE KDRADQTVLT E. Chromogranin B is a tyrosine sulfated secretor