Stabilization of tumor antigens by chemical modification with diethyl pyrocarbonate.

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Stabilization of tumor antigens by chemical modification with diethyl pyrocarbonate.

C3H mice were immunized with MH134 tumors modified with two different chemicals, DEPC and TNBS, and the tumor-neutralizing activities of the spleen cells were examined after separating the cells by a Nylon-wool column, plastic dish, or treatment with specific antibodies (anti-mouse IgG and anti-mouse theta sera). The effector cells induced in mice by immunization with TNBS-treated tumors were T...

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Histidine modification with diethyl pyrocarbonate shows heterogeneity of benzodiazepine receptors.

The effect of diethyl pyrocarbonate modification of histidine on the specific binding of [3H]diazepam and its enhancement with muscimol and (+/-)-pentobarbital was investigated. Diethyl pyrocarbonate treatment produced a dose-related inhibition of specific [3H]diazepam binding to rat brain membranes with a maximal inhibition of approximately 40% at 1 mM. Scatchard analysis of the binding data s...

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Diethyl pyrocarbonate: a chemical probe for DNA cruciforms.

Two palindromic DNA sequences were analyzed with respect to their chemical reactivities with diethyl pyrocarbonate. In negatively supercoiled plasmid templates enhanced N7 carbethoxylation was found with individual purines located in presumptive single-stranded loops of DNA cruciform structures. No enhanced reactivity at these positions was observed in linear, relaxed or low superhelical densit...

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Reaction of diethyl pyrocarbonate with nucleic acid components. I. Adenine.

The use of diethyl pyrocarbonate as a nuclease inhibitor in the preparation of RNA of high molecular weight has prompted a study of the possible reactions of this compound with nucleic acid components under the conditions generally employed for providing inhibition. The first substrate investigated was adenine, which has been found to undergo ring opening with the formation of 5(4)-N-carbethoxy...

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The reaction of rabbit muscle creatine kinase with diethyl pyrocarbonate.

The reaction of rabbit muscle creatine kinase with diethyl pyrocarbonate was studied. It was found that up to five of the sixteen histidine groups per enzyme subunit could be modified, and under the conditions employed, there was no evidence for formation of the disubstituted derivative of histidine. Evidence was obtained for small but significant amounts of modification of lysine and cysteine ...

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ژورنال

عنوان ژورنال: Agricultural and Biological Chemistry

سال: 1990

ISSN: 0002-1369,1881-1280

DOI: 10.1271/bbb1961.54.1615