A new bioactive proline-rich cyclohexapeptide - diandrine C (6), previously isolated from whole plant of Drymaria diandra (Caryophyllaceae), was synthesized through coupling reactions of tetrapeptide unit Boc-Gly-l-Pro-l-Tyr-l-Trp-OH with dipeptide unit l-Pro-Gly-OMe using N,N-diisopropylcarbodiimide (DIPC) as the coupling agent, followed by cyclization of l...

This experiment was conducted to study the role of glyoxalase system in conferring salinity and drought stress in Brassica spp. Two Brassica genotypes viz. BARI Sharisha16 (tolerant) and Tori7 (susceptible) were exposed to salt (16 dS m) and drought for 2, 4 and 6 days. The comparative study of two Brassica genotypes under salinity and drought stresses revealed that BARI Sharisha16 is more tole...

The mechanism of hydrolysis and absorption of a proline-containing tetrapeptide, Leu-Pro-Gly-Gly (10 mM) by rat intestine was examined in vivo by using jejunal perfusion methods. The peptide substrate and hydrolysis products were analyzed by use of an automated amino acid analyzer. Leucine, proline, and glycine were absorbed by the intestine at a significantly higher rate from the tetrapeptide ...

Manual and automated sequencing of peptides isolated from tryptic, chymotryptic, and Staphylococcus aureus V8 protease digests of the beta chain of histidine decarboxylase from Lactobacillus 30a have established the following sequence for the wild type protein: NH2-Ser-Gly-Leu-Asp-Ala-Lys-Leu-Asn-Lys-Leu-Gly-Val-Asp-Arg-Ile-Ala-Ile-Ser-Pro -Tyr-Lys-Gln-Trp-Thr-Arg-Gly-Tyr-Met-Glu-Pro-Gly-Asn-Il...

Kaolin clay (KN) was employed as an inorganic filler to modify a cross-linked chitosan-glyoxal Schiff’s-based chitosan composite derivative (CTS-GLY). The resulting (CTS-GLY/KN) found be promising synthetic biopolymer that can potentially utilized for color removal well COD reduction of industrial anionic dye (remazol brilliant blue R, RBBR). surface porosity, crystallinity, morphology, functio...

The equilibrium molecular structures of the two lowest-energy conformers of glycine, Gly-Ip and Gly-IIn, have been characterized by high-level ab initio electronic structure computations, including all-electron cc-pVTZ CCSD(T) geometry optimizations and 6-31G* MP2 quartic force fields, the latter to account for anharmonic zero-point vibrational effects to isotopologic rotational constants. Base...

CLINICAL CHEMISTRY, Vol. 41, No. 11, 1995 1663 strate having a composition optimal for ACE activity (8), account for the relatively high ACE unit values we report for this method. The presence of GGT does, however, accelerate an autolytic release of Gly-Gly from Hip-GlyGly in the reagent 1 solution, falsely increasing apparent ACE activity. Nonetheless, because calibrator activity and sample ac...

cellulose nanocrystal (cnc) is a type of nanomaterial which is produced by partial hydrolysis of cellulose and elimination of its amorphous regions. cnc has several advantages such biodegradability and safety toward human health. in this study, cnc was produced from cotton linters and methods such transmission electron microscopy which were used for confirmation of nanoscale size production of ...

background: genetic factors associated with cancer have been widely investigated and several polymorphisms have been connected with breast cancer. breast cancer (bc) can be considered one of the most popular reasons of death among women. bc, likewise, is the second cause of death in iran. the present research aims at determining the frequency of the fibroblast growth factor receptor (fgfr) gene ...

The scuteUa separated from germinating barley grains (Hordewn vagare L. cv. Himalaya) took up the dipeptide 14Clglycylglycine (Gly-Gly) rapidly from incubation media. The pH optimum of the process was about 4.5, and the rate of uptake conformed to Michaelis-Menten kinetics with an apparent Km of 2.3mm and V. of41 imole gram-l hour-'. The uptake was strongly inhibited by dinitrophenol and cyanid...