Based on limited published evidence, BRICD5 (BRICHOS domain containing 5) is a protein-binding molecule located on chromosome 16. UniProt annotations indicate roles in protein binding and regulation of cell population proliferation. BRICD5 was identified in an epigenome-wide association study as a differentially methylated region associated with lung cancer risk in pre-diagnostic blood samples 1, though the authors note causality remains to be established. Specific molecular mechanisms and cellular functions require further investigation.