עמוד 1 מ 161 תוצאות
Our objective was to determine the coordination of transcript and/or protein abundances of stromal enzymes during leaf senescence. First trifolioliate leaves of Phaseolus vulgaris L. plants were sampled beginning at the time of full leaf expansion; at this same time, half of the plants were switched
The proteases of the larvae of the webbing clothes moth, Tineola bisselliella, were investigated because of this organism's phylogenetic rank as a member of the lower invertebrates, its unique position as one of the relatively few organisms that can digest keratin and its importance as a serious
Two isoforms of a protease inhibitor were isolated by ion-exchange chromatography of tepary bean (Phaseolus acutifolius G.) seed proteins. The main isoform was used to determine the amino acid sequence of the protein. It is an 80 amino acid residue protein with a molecular mass of 8765 Da, showing
Protease inhibitors are crucial for the control of proteolytic activity in different physiological processes. However, some inhibitors do not show canonical enzyme recognition of the enzyme under certain conditions. In this work, we present evidence that indicates the formation of an active complex
The heat stabilization resulting from specific association of serine proteases with either of two multiheaded protease inhibitors, chicken ovoinhibitor or lima bean protease inhibitor, was determined at pH 6.7 in a differential scanning calorimeter. The 2:1 complex of either bovine
Isoelectric focusing of culture supernatants from Vibrio cholerae El Tor 1621 and high protease-producing mutant strain 1621 hip revealed the presence of three different types of extracellular protease. Type I protease was the major activity in the wild-type strain and was inhibited by
A proteolytic activity associated with the microsomal fraction of L-5178Y/Esb tumor cells has been characterized. The enzyme has a molecular weight of 80-90 kD as determined by affinity-labelling with [3H]DFP and SDS-gel electrophoresis. It cleaves ester substrates at the carboxyl position of lysine
When pancreatic DNase I is used as a specific biochemical reagent in the preparation of nuclear ribonucleic acids or nuclear proteins, freedom from contaminating ribonucleases or proteases is an important property of the enzyme preparation. A simple one-step procedure has been developed to effect
A protease with a molecular mass of 30 kDa and the N-terminal sequence of GLQTNAPWGLARSS, was isolated from fresh fruiting bodies of the wild edible mushroom Termitomyces albuminosus. The purification protocol included ion exchange chromatography on DEAE-cellulose, Q-Sepharose, SP-Sepharose and
Routine evaluation of 12 children with Cooley's anemia revealed that each one had a prolonged partial thromboplastin time. However, prothrombin time and thrombin time were within the normal range. Specific assays demonstrated low levels of the four contact factors: factors XI, XII, prekallikrein,
The role of gastric juice in the intestine on the pancreatic secretory response to intraduodenal infusion of trypsin inhibitors or to diversion of bile and pancreatic juice from the intestine was studied in conscious rats with pylorus ligation and gastric juice drainage. In absence of gastric juice
Chymase, the major neutral protease of the rat serosal mast cell (RMC) secretory granule, causes RMC to release their secretory granules and to oxidatively metabolize endogenous arachidonic acid to prostaglandin D2 (PGD2). The granule markers, endogenous beta-hexosaminidase and exogenously added
Plasma from women taking combined oral contraceptives and cold-activated plasma contain proteases which cleave chromogenic substrates in protein C assays in the absence of protein C activators such as Protac. This spontaneous activity makes a background substraction necessary and makes protein C
A membrane protease possessing thrombin-like activity was purified to homogeneity from mitochondria of rat submaxillary gland. The molecular mass of the enzyme was determined to be 45 kDa by SDS/PAGE under reducing conditions and by gel filtration on a Sephadex G-100 column. The enzyme is a
Based on substrate specificity, an alkaline pH optimum, sensitivity to selected proteinase inhibitors, and molecular analysis, we provide evidence for the presence of a trypsin-like serine proteinase in the salivary gland complex (SGC) of the tarnished plant bug, Lygus lineolaris (Palisot de