Supplemental Table. Genes located within 1 LOD drop range of highest observed peak from linkage analysis with percent mammographic density on chromosome 5p Gene Name GeneID Position Description LOC728411 728411 5p14.3 similar to Beta-glucuronidase precursor LOC728401 728401 5p14.3 similar to nuclear pore membrane protein 121 CDH12 1010 5p14-p13 cadherin 12, type 2 (N-cadherin 2) LOC643300 643300 5-14.3 similar to 60 kDa heat shock protein, mitochondrial precursor (Hsp60) PMCHL1 5369 5p14.3 pro-melanin-concentrating hormone-like 1 LOC391771 391771 5p14.2 similar to protein tyrosine phosphatase, non-receptor type 11 PRDM9 56979 5p14 PR domain containing 9 C5orf17 439936 5p14.2 chromosome 5 open reading frame 17 LOC503540 503540 5-14.2 fused toes homolog (mouse) pseudogene CDH10 1008 5p14-p13 cadherin 10, type 2 (T2-cadherin) LOC729826 729826 5p14.1 hypothetical protein LOC729826 MSNL1 4479 5p14.1 moesin-like 1 CDH9 1007 5p14 cadherin 9, type 2 (T1-cadherin) LOC643401 643401 5p14.1 hypothetical protein LOC643401 LOC729862 729862 5p14.1 similar to Striatin PGBD3P2 267006 5p13.3 piggyBac transposable element derived 3 pseudogene 2 HPRTP2 3254 5p13.3 hypoxanthine phosphoribosyltransferase pseudogene 2 LOC391774 391774 5p13.3 similar to ribosomal protein L19 1 Supplemental Table. Genes located within 1 LOD drop range of highest observed peak from linkage analysis with percent mammographic density on chromosome 5p (cont) Gene Name GeneID Position Description CDH6 1004 5p15.1-p14 cadherin 6, type 2, K-cadherin (fetal kidney) RNASEN 29102 5p13.3 ribonuclease III, nuclear C5orf22 55322 5p13.3 chromosome 5 open reading frame 22 PDZD2 23037 5p13.3 PDZ domain containing 2 LOC728523 728523 5p13.3 similar to ribosomal protein L9 GOLPH3 64083 5p13.3 golgi phosphoprotein 3 (coat-protein) LOC202122 202122 5p13.3 similar to ribosomal protein L27 MTMR12 54545 5p13.3 myotubularin related protein 12 ZFR 51663 5p13.3 zinc finger RNA binding protein LOC646616 646616 5p13.3 chromosome 1 open reading frame 37 pseudogene SUB1 10923 5p13.3 SUB1 homolog (S. cerevisiae) NPR3 4883 5p14-p13 natriuretic peptide receptor C/guanylate cyclase C (atrionatriuretic peptide receptor C) C5orf23 79614 5p13.3 chromosome 5 open reading frame 23 LOC340113 340113 5p13.3 hypothetical protein LOC340113 LOC728553 729553 5p13.3 similar to 40S ribosomal protein S8 TARS 6897 5p13.2 threonyl-tRNA synthetase LOC646639 646639 5p13.3 similar to Probable mitochondrial import receptor subunit TOM40 homolog (Translocase of outer membrane 40 kDa subunit homolog) (Haymaker protein) (p38.5) 2 Supplemental Table. Genes located within 1 LOD drop range of highest observed peak from linkage analysis with percent mammographic density on chromosome 5p (cont) Gene Name GeneID Position Description ADAMTS12 81792 5q35 ADAM metallopeptidase with thrombospondin type 1 motif, 12 RXFP3 51289 5p15.1-p14 relaxin/insulin-like family peptide receptor 3 SLC45A2 51151 5p13.3 solute carrier family 45, member 2 AMACR 23600 5p13.2-q11.1 alpha-methylacyl-CoA racemase C1QTNF3 114899 5 C1q and tumor necrosis factor related protein 3 LOC643373 643373 5p13.3 similar to Beta-glucuronidase precursor (Beta-G1) LOC646652 646652 5p13.3 integral membrane glycoprotein-like LOC729915 729915 5p13.3 similar to Nuclear envelope pore membrane protein POM 121 (Pore membrane protein of 121 kDa) (P145) LOC401180 401180 5p13.2 hypothetical LOC401180 RAI14 26064 5p13.3-p13.2 retinoic acid induced 14 3 .