Peptide sequence: PGKPEGPPPQ GGNQSQGPPP RPGKPEGPPS QGGNKPQGPP PHPGKPQGPP Sequence homology: Human: 100%; Rat: 83%. PRB3 protein is identical to the gross cystic disease fluid protein GCDFP-15, secretory actin binding protein (SABP) and glycoprotein 17 (G