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Left bundle branch block (LBBB) is a cardiac conduction abnormality seen on the electrocardiogram (ECG). In this condition, activation of the left ventricle is delayed, which causes the left ventricle to contract later than the right ventricle.
Entrez Gene Summary for HBB Gene. The alpha (HBA) and beta (HBB) loci determine the structure of the 2 types of polypeptide chains in adult hemoglobin, Hb A. The normal adult hemoglobin tetramer consists of two alpha chains and two beta chains.Mutant beta globin causes sickle cell anemia.eneCards Summary for HBB Gene. HBB (Hemoglobin, Beta) is a Protein Coding gene. Diseases associated with HBB include sickle cell anemia and heinz body anemia. Among its related pathways are Hemostasis and Metabolism.