💡 Rate limiting: Glycolysis = PFK-1. TCA = Isocitrate Dehydrogenase.

💡 B1 = Beriberi. B3 = Pellagra (3 Ds). B12 = Pernicious anemia.

💡 LDL carries cholesterol to tissues. HDL carries back to liver.

💡 Southern blot = DNA. Northern = RNA. Western = Protein (SNW DRP).

💡 PKU = Phenylalanine hydroxylase deficiency. Maple syrup = branched chain.

💡 Competitive inhibitor: increased Km, same Vmax. Non-competitive: same Km, decreased Vmax.

💡 ALA synthase = rate limiting. Acute intermittent porphyria = abdominal pain + neuro.

💡 Lesch-Nyhan = HGPRT deficiency. Gout = uric acid crystals.

💡 Von Gierke = G6Pase deficiency. HMP shunt = NADPH + Ribose-5-P.

💡 Iron: Ferritin = storage, Transferrin = transport. Wilson disease = copper.