Amino acids can exist in two stereoisomeric forms, D-amino (dextrorotatory) and L-amino (levorortatory). Most amio acid exist in the L-isomer form in living organisms. However in recent years with major technological advancements in science D-isomers have also been found in living things. D-isomers are mainly found in bacteria in the peptidoglycan cell wall.
- ↑ Hardin J, Bertoni G, Kleinsmith L.J. Becker's World of the Cell, 8th ed. : Benjamin Cummings;
- ↑ Polluzioni L. A World in the Mirror: D amino acids. http://www.d-aminoacids.com/Introduction/introduction.html (accessed 3 December 2016).
- ↑ Polluzioni L. A World in the Mirror: D amino acids. http://www.d-aminoacids.com/organisms/organisms.html (accessed 3 December 2016).