Immunogen sequence: SPPGKPQGPP QQEGNKPQGP PPPGKPQGPP PAGGNPQQPQ APPAGKPQGP PPPPQGGRPP RPAQGQQPPQ. This gene encodes a member of the heterogeneous family of basic, proline-rich, human salivary glycoproteins. The encoded preproprotein undergoes proteolytic