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L-form (Laevorotatory form) is referred to the left handed configuration of amino acids[1] and it is the stereoisomer which makes plane polarised light rotates to the left[2]. Almost all amino acids form two type of enantiomers except glycine because it has two hydrogen atoms attached to the central carbon atom[3]. The two different stereoisomers are the D-form and the L-form[4]. The latter is the common form of amino acids and manufactured in the cells and L-amino acids are translated into proteins[5]. D-amino acids can be found in bacterial cell walls, but not in the cell[6] because it causes death[7]. It is said that the L-form and D-form are referred to life and death (L=living, D=dead)[8]


  1. http://www.phschool.com/science/biology_place/biocoach/bioprop/landd.html
  2. http://www.cryst.bbk.ac.uk/education/AminoAcid/stereochem.html
  3. http://www.phschool.com/science/biology_place/biocoach/bioprop/landd.html
  4. http://www.phschool.com/science/biology_place/biocoach/bioprop/landd.html
  5. http://www.phschool.com/science/biology_place/biocoach/bioprop/landd.html
  6. http://www.phschool.com/science/biology_place/biocoach/bioprop/landd.html
  7. Biochemistry Lecture 2 by Professor Jeremy Lakey
  8. Biochemistry Lecture 2 by Professor Jeremy Lakey
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