the 20 standard l-amino acids

acid acids alanine amino aminoacid and arginine asparagine aspartate aspartic atom atomic atoms ball ballandstick biochemistry biogenic biological biology chemistry collection composition compound cysteine found glutamate glutamic glutamine glycine health histidine illustration isoleucine leucine lysine methionine model molecular molecule natural organic phenylalanine proline protein proteinogenic proteins raytrace representation science serine standard stick structural structure substance threonine tryptophan twenty tyrosine valine