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By Soundar Divakar
Transformations utilizing enzymes were commonly investigated within the final twenty years and the consequences promise nice power for this turning out to be box, specially within the zone of man-made natural chemistry frequently as a result of of its many benefits. consequently, this booklet has tried to carry out some great benefits of utilizing enzymes regarding advanced underivatized and unprotected substrates in non-polar media lower than homogenous and heterogeneous response stipulations. benefits and demerits of utilizing enzymes by way of yields and selectivity/specificity are awarded with none prejudice. just about all the reactions handled are from the author’s laboratory comprising different substrates, and the catalysis includes very important hydrolyzing enzymes, widely tested for the opposite reactions. therefore, esterification concerning lipses and glycosylation regarding glycosidases have been investigated with admire to numerous techniques like optimization of response stipulations, reaction floor technique and kinetics, conducting reactions lower than solvent, non-solvent and large severe carbon dioxide stipulations. briefly, the paintings provided is to make sure the comprehension of the issues confronted by way of the researchers during this zone with a view to figure out extra effective concepts for engaging in enzymatic variations within the laboratory effectively with higher yields and specificity.
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4. Improved product yield and better product quality. 5. Exploitation of the stereo- and regiospecificities shown by lipases to produce high-value chiral synthons. 6. Success in immobilisation techniques that have enabled the reuse of lipases leading to economically viable processes. 7. Good conversion yields. 8. Lipases are highly thermostable, exhibiting activity at 100°C. 9. 2 Commercially important esters synthesised by lipase mediated catalysis Compound Flavour esters Isoamyl acetate Use Lipase References Banana flavour Pseudomonas fluorescence Candida antarctica Rhizomucor miehei Takahashi et al.
Biosci Biotech Biochem 57:1290–1293 Konstantinovic S, Predojevic J, Gojkovic S, Ratkovic Z, Mojsilovic B, Pavlovic V (2001) Synthesis of C7-C16 alkyl 2,3 dideoxy glucosides from glucose and fatty acids. C. 3) is the References major starch-degrading enzyme secreted by the phytopathogenic fungus Colletotrichm gloeosporiodes. J Gen Microbiol 137:2463–2468 Kren V (2001) Chemical biology and biomedicine of glycosylated natural compounds. In: Fraser-Reid B, Tatsuta K, Thiem J (eds) Glycoscience chemistry and chemical biology, vol 3.
Porcine pancreas has been the source of lipase for most of the work on pancreatic lipase. It is also the richest source for pancreatic lipases, and it is the first purified lipase (Peschke 1991). Pancreatic lipase, a serine hydrolase, contains a single-chain glycoprotein of about 48-KDa molecular weight (Winkler and Gubernator 1994). 1 Lipases 25 ing of residues 248–258 covering the active site (van Tilbeurgh et al. 1992). 2 Fig. 1 Schematic ribbon diagram of the porcine lipase– colipase structure.