lysine lys, k amino acid, molecular model.

lysine lys amino acid molecular model protein molecule chemistry biochemistry biotech peptide antibody oxygen carbon hydrogen nitrogen sulfur polymer biology sidechain ball stick zwitterion chain ribosome nutrition food supplement essential proteinogenic biosynthesis synthesis bond posttranslational modification acids are building blocks all proteins three representations 2d skeletal formula 3d ballstick spacefilling atoms represented as spheres conventional color coding white grey red blue