Journal of Molecular Catalysis B: Enzymatic 133 S452-S458 2016年12月 [査読有り]
This study kinetically characterized the mechanism of the enzymatic synthesis of theaflavins (TFs) from catechins by mushroom tyrosinase (EC 1.14.18.1). In reactions containing one of four catechins, (-)-epicatechin (EC), (-)-epigallocatechin (EGC...
Biochemistry and Biophysics Reports 7 338-346 2016年9月 [査読有り]
Background Previously, we had reported that α-chymotrypsin–catalyzed polymerization of l-cysteine ethyl ester in a frozen buffer provided poly-l-cysteine (PLCys) in good yield, of which degree of polymerization had been determined to be 6–11. Almo...
Jun Mitsuhashi   Tsutomu Nakayama   Asako Narai-Kanayama   
ENZYME AND MICROBIAL TECHNOLOGY 75-76 10-17 2015年7月 [査読有り]
Di-, tri-, and tetra-tyrosine peptides with angiotensin I-converting enzyme inhibitory activity were synthesized by papain-catalyzed polymerization of L-tyrosine ethyl ester in aqueous media at 30 degrees C. Varying the reaction pH from 6.0 to 7.5...
The tuberous root of yacon (Smallanthus sonchifolius) is a rich source of fructooligosaccharide (FOS), which has a prebiotic effect. However, FOS significantly decreases accompanying (or FOS significantly decreases with) an increase in fructose du...
INTERNATIONAL JOURNAL OF FOOD SCIENCES AND NUTRITION 63(4) 402-410 2012年6月 [査読有り]
The effects of non-fermented soybean milk (NFSM) and fermented soybean milk (FSM) intake on the faecal microbiota and metabolic activities in 10 healthy volunteers were investigated. Soybean oligosaccharides, raffinose and stachyose were utilized ...