Complete amino acid sequence of a basic proline-rich peptide, P-F, from human parotid saliva.

The complete amino acid sequence of a basic proline-rich peptide, P-F, isolated from human parotid saliva was determined to be Ser-Pro-Pro-Gly-Lys-Pro-Gln-Gly-Pro-Pro-Pro-Gln-Gly-Gly-Asn-Gln-Pro-Gln-Gly-Pro-Pro-Pro-Pro-Pro-Gly-Lys-Pro-Gln-Gly-Pro-Pro-Pro-Gln-Gly-Asn-Lys-Pro-Gln-Gly-Pro-Pro-Pro-Pro-Gly-Lys-Pro-Gln-Gly-Pro-Pro-Pro-Gln-Gly-Ser-Lys-Ser-Arg-Ser-Ala by conventional methods. P-F contains a number of repeating sequences and oligo-proline structures identical with those in other proline-rich peptides such as P-C, P-D, P-E, and Protein C. P-F has the highest degree of homology with P-E among these proline-rich peptides.