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- _4 value "Treatment of SR with channel activators (micromolar Ca2+, nanomolar ryanodine, or millimolar caffeine), 1) slows CPM labeling kinetics > 10-fold, 2) negates CPM labeling of channel-associated sulfhydryls, and 3) stabilizes a high molecular weight complex (HMWC) which appears on nonreducing SDS-polyacrylamide gel electrophoresis gels. The HMWC is positively identified as RyR1 and triadin by Western blot and immunoprecipitation analyses. High-affinity [3H]ryanodine-binding sites are immunoprecipitated by either anti-RyR1 or anti-triadin antibody dose dependently. 1,4-Naphthoquinone (< or = 40 pmol/micrograms protein) selectively oxidizes hyperreactive sulfhydryls on RyR1 and triadin, induces Ca2+ efflux from SR, and stabilizes the HMWC." provenance.
- _4 wasQuotedFrom 7806531 provenance.