Now showing items 11-20 of 1529
Characterization of gastrin amidation in the rat and porcine antrum: comparison with the pituitary
(Elsevier, 1990-04-24)
The formation of biologically active gastrin from glycine-extended processing intermediates occurs via the action of a peptide [alpha]-amidating enzyme. The observation that gastrin exists primarily as unamidated precursors ...
The specificity and significance of the inhibition of Fc receptor binding by anti H-2 sera
(Springer-Verlag; Springer-Verlag New York Inc., 1975-12)
The possibility that Ia antigens are unique among H-2 antigens in their relationship to the Fc receptor was investigated in an EA rosette assay. Antibody specific for antigens in various regions of the H-2 complex was ...
Synthesis of N2‐Substituted Deoxyguanosine Nucleosides from 2‐Fluoro‐6‐O‐(Trimethylsilylethyl)‐2′‐Deoxyinosine
(Wiley Periodicals, Inc.Aldrich Chemical Co., 2000-02)
Syntheses of N2‐substituted nucleosides have been studied for many years, primarily with ribonucleosides. However, the primary route to these compounds requires acidic conditions that are too vigorous for the acid‐labile ...
Suppression of natural killer (NK) cell activity of spleen cells by thymocytes
(Elsevier, 1981-02)
The in vitro influence of thymus cells on natural killer cell activity of spleen cells against prelabeled target cells (YAC-I and RL[male symbol]I) has been studied in syngeneic as well as in allogeneic murine models. In ...
Effectiveness factor calculations for immobilized enzyme catalysts
(Wiley Subscription Services, Inc., A Wiley Company, 1973-09)
The steady state, nonlinear diffusion equations which describe reactions in constrained enzyme solutions are of great interest in many biological and engineering applications. As in other types of nonlinear differential ...
Rapid protein release from Escherichia coli by chemical permeabilization under fermentation conditions
(Wiley Subscription Services, Inc., A Wiley Company, 1992-03-25)
Overall protein release greater than 75% in less than 1 h can be attained by exposing exponentially growing Escherichia coli cells to 0.4 M guanidine plus 0.5% Triton X-100 at 37°C in medium. Cell growth stops immediately ...
Virulent mutants of phage P22 : II. Physiological analysis of P22 virB-3 and its component mutations
(Elsevier, 1972-03)
The virulent mutant of phage P22, virB-3, consists of two mutations: K5, which maps in the c2 repressor gene, and Vx, which maps between c2 and c3. Although neither P22 K5 nor P22 Vx is virulent, each of these mutants can ...
Properties of yeast pyruvate decarboxylase and their modification by proteolytic enzymes : I. Stability of decarboxylases from wild-type and mutant strains
(Elsevier, 1968)
High concentrations of inorganic phosphate and ammonium sulfate stabilize yeast pyruvate decarboxylase to heating at 60 [deg] for long periods of time in the presence of TPP and Mg+. When heated at 60 [deg] in phosphate ...
MoFe Cofactor of nitrogenase: Extraction, purification, and characterization
(Elsevier, 1989-08)