The protein encoded by this gene is a proline-rich salivary protein. This gene and five other genes that also encode salivary proline-rich proteins (PRPs), as well as a gene encoding a lacrimal gland PRP, form a PRP gene cluster in the chromosomal 12p13 region. Alternatively spliced transcript variants encoding distinct isoforms have been described.[6]
Kauffman D, Hofmann T, Bennick A, Keller P (1986). "Basic proline-rich proteins from human parotid saliva: complete covalent structures of proteins IB-1 and IB-6". Biochemistry. 25 (9): 2387–92. doi:10.1021/bi00357a013. PMID3521730.
Kauffman D, Wong R, Bennick A, Keller P (1983). "Basic proline-rich proteins from human parotid saliva: complete covalent structure of protein IB-9 and partial structure of protein IB-6, members of a polymorphic pair". Biochemistry. 21 (25): 6558–62. doi:10.1021/bi00268a036. PMID6924859.
Kim HS, Lyons KM, Saitoh E, etal. (1993). "The structure and evolution of the human salivary proline-rich protein gene family". Mamm. Genome. 4 (1): 3–14. doi:10.1007/BF00364656. PMID8422499. S2CID24058984.