aterial for production of vitamin D and of steroid hormones cholesterol ??? ??? ??? Steroid hormones aldesterone (adrenal gland, controls Na+ and Cl-) ??? ??? ??? Amino acids contain Amine group (NH2), Carboxyl Group, R group ??? ??? ??? R group makes each amino acid different from each other Amino Acids ??? ??? ??? CHON Amino Acids ??? ??? ??? Plants use this to build their own types of proteins