Vitamin B7 (Biotin)
Vitamin B7 (Biotin) is a water-soluble vitamin, important in metabolism as a cofactor for several important carboxylase enzymes.
Enzymes dependent on biotin include pyruvate carboxylase (see Pyruvate Metabolism), acetyl-CoA carboxylase (see Fatty Acid Synthesis), and propionyl-CoA carboxylase.
Biotin Deficiency is rare, but it can be induced by antibiotic usage or excessive consumption of raw egg whites. In particular, the avidin in egg whites binds and sequesters biotin. Patients with a biotin deficiency typically present with dermatitis, diarrhea, and alopecia.
Find Vitamin B7 and other Vitamins among Pixorize's visual mnemonics for the USMLE Step 1 and NBME shelf exams.