amino acid with two carboxyl groups and one amine group

text sketch presentation pattern number logo line font drawing document diagram design circle cartoon brand aspartic acid molecular structure chemical formula amino carboxyl amine organic biochemistry protein synthesis essential nonessential metabolism neurotransmitter brain function signaling nervous system skeletal muscle growth nitrogen cycle carbon hydrogen oxygen nitrogenous compound acidic polarity zwitterion solubility medical pharmaceutical supplement health science laboratory research biotechnology analysis education school