L-form

 L-form (Laevorotatory form) is referred to the left handed configuration of amino acids and it is the stereoisomer which rotates plane polarised light to the left. Almost all amino acids form two type of enantiomers except Glycin because it has two hydrogen atoms attached to the central carbon atom. The two different stereoisomers are the D-form and the L-form. The latter is the common form of amino acids and manufactured in the cells and L-amino acids are translated into proteins. D-amino acids can be found in bacterial cell walls, but not in the cell because it causes death. It is said that the L-form and D-form are referred to life and death (L=living, D=dead).