3) and encodes the protein polycystin-1 (PC1), while PKD2 maps to chromosome 4 (4q21–23) and encodes the protein polycystin-2 (PC2).
3 ) and encodes the protein polycystin-1 ( PC1 ), while PKD2 maps to chromosome 4 ( 4q21–23 ) and encodes the protein polycystin-2 ( PC2 ) .