A ball-and-stick model structure of basic (positively-charged) amino acid histidine (His, H). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. amino acid amino acid Histidine (amino acid)
A ball-and-stick model structure of basic (positively-charged) amino acid arginine (Arg, R). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. amino acid amino acid Arginine (amino acid)
A ball-and-stick model structure of basic (positively-charged) amino acid lysine (Lys, K). Carbon in blue-grey, oxygen in red, nitrogen in green, hydrogen in silver. Drawn in Inkscape. amino acid amino acid Lysine (amino acid)