Jundishapur Journal of Microbiology
L-tryptophan (L-Trp) is a nutritionally essential amino acid that the body uses to synthesize proteins, niacin (vitamin B3) and serotonin (neurotransmitters). Human and animals depend on plants and microorganisms for its supply. Remarkable increasing demand has caused the development of a wide variety of biotechnological methods for its production which work as well for other amino acids.
The present work reports on the use of Iranian sugar beet molasses as an inexpensive source of L-serine (precursor) and PLP (cofactor) for the production of L-Trp by
Consequently, the potassium phosphate buffer system was considered as the suitably buffered reaction medium. The concentration of L-Trp produced in reaction medium was 0.3 mM and 0.12 mM for glucose and molasses (a combination of sugar beet and cane molasses), respectively.
our present study shows that sugar beet molasses is a source of PLP and L-Ser; and hence, suggests the general application of the approach to produce L-Trp more economically.
© 2013, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.
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