RT Journal Article SR Electronic T1 BRCA1 and BRCA2 proteins: roles in health and disease. JF Molecular Pathology JO Mol Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 237 OP 247 DO 10.1136/mp.51.5.237 VO 51 IS 5 A1 J A Duncan A1 J R Reeves A1 T G Cooke YR 1998 UL http://mp.bmj.com/content/51/5/237.abstract AB Between 5% and 10% of all breast cancer is hereditary, with patients having a strong family history of the disease. The remaining 90-95% of cases are classed as sporadic. Within the inherited group, 80-90% of cases are the result of germline mutations affecting two recently identified genes: BRCA1 and BRCA2. Since the sequencing of these genes, considerable research on the genetics of the mutation carriers has been performed, with less attention having been focused on the BRCA1 and BRCA2 proteins themselves. The structure and function of the protein products thus continues to hold mystery and might be the key to the full understanding of this complex disease.