"HBB — Hemoglobin, Beta" gene HBB HBB - hemoglobin, beta - Genetics Home Reference "HBB — Hemoglobin, Beta" HBB https://ghr.nlm.nih.gov/gene/HBB beta globin gene https://ghr.nlm.nih.gov/gene/HBB HBB HBB US Library of Medicine, 2011 beta abnormal beta globin chain