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biochemistry mbbs bems metabolism bds proteins amino acids medicine vitamins health biomedical pregnancy urea cycle nutrition protons disorders water soluble vitamins medical decarboxylation deamination synthesis carbohydrates lipids transamination urea cycle disorders b12 b9 b5 b7 aminoacids b6 b2b b3 b1 nitrogen fat soluble vitamin k vitamin vitamin e vitamin d vitamin a inheritence electrons transport genetics dna rna polymerase steroids fatty acids oxidation reduction pyrimidine science higher education b complex uronic acid glucuronic acid vitamin c gyneacology obstetrics abnormal labour c section diagnosis dystocia peads presentation lactation newborn diet carbs marasmus kwashiorkor diseases fructose