Organic Chemistry: Current Research
Open Access
ISSN: 2161-0401
+44 1478 350008
ISSN: 2161-0401
+44 1478 350008
Sheets RL
Tanzania
Research Article
In Vitro Synthesis of Ten Starches by Potato Starch-Synthase and Starch- Branching-Enzyme Giving Different Ratios of Amylopectin and Amylose
Author(s): Mukerjea R, Sheets RL, Gray AN and Robyt JFMukerjea R, Sheets RL, Gray AN and Robyt JF
The objectives of this study was the use of two highly purified enzymes, potato Starch-Synthase (SS) and Starch- Branching-Enzyme (SBE) to obtain in vitro the syntheses of ten starches, with different ratios of amylopectin and amylose. The amylose was first synthesized by the reaction of SS with ADP [14C] Glc to give ten identical amyloses; the amylopectin was then synthesized by the action of SBE to give ten starches with different amounts of amylopectin. Two of the 14C-amyloses were reacted with 1.0 mIU of purified Starch-Branching-Enzyme (SBE) for 75 and 130 sec, respectively. In a second synthesis, 3 of the amyloses were autoclaved and reacted with 1.0 mIU for 15, 45, and 75 sec. In the third synthesis, 5 amyloses were reacted with different amounts of SBE from 0.50 to 0.01 mIU for 130 sec each. The 10 synthesized starches were separated into amylopectin and amylose fractions. The.. View More»
DOI:
10.4172/2161-0401.1000142