Members of the BCL family have significant sequence similarity at their N-terminus, represented in this family. The function of BCL7 proteins is unknown. They may be involved in early development. In addition, BCL7B is commonly hemizygously deleted in patients with Williams syndrome [1].

1: The BCL7 gene family: deletion of BCL7B in Williams syndrome. Jadayel DM, Osborne LR, Coignet LJ, Zani VJ, Tsui LC, Scherer SW, Dyer MJ; Gene 1998;224:35-44. PMID:9931421