Immunogen sequence: GVTDGNEVAK AQQATPGGAA PTIFSRILDK SLPADILYED QQCLVFRDVA PQ. Histidine triad proteins, such as HINT2, are nucleotide hydrolases and transferases that act on the alpha-phosphate of ribonucleotides (Brenner, 2002 [PubMed 12119013]).[suppl