The human gene sequences encoding the translation-associated functions of a-subunit of elonga-tion factor 1 (EF-la) and the ubiquitin carboxyl extension protein (HUBCEP80) have been isolated by differential cDNA screening, and found to have significantly higher levels of expression in fibroadenomas (benign) compared with carcinomas (malignant) of the breast. These data parallel our previous fin...