Immunogen sequence: QERDIVPVDA SYEVKELYVP ENKLHLAKTD AETLPALKIN KVDMQWVQVL AE. Three-prime-phosphoadenosine 5-prime-phosphosulfate (PAPS) is the sulfate donor cosubstrate for all sulfotransferase (SULT) enzymes (Xu et al., 2000 ). SULTs catalyze the sulf