Abstract
Dot-immunobinding assay for anti-calmodulin (CaM), and immunoblot assay for CaM have become feasible by proper choice of a fixative, i.e., formaldehyde vapor. The protocol for these simple and convenient immunological procedures is presented. Dot-immunobinding assay could be accomplished in 3 h, and immunoblot assay in 8 h. Activities of anti-CaM antibodies in fractions eluted from CaM affinity column were monitored by immunobinding assay. Semiquantitative immunoblot analysis was used to estimate CaM present in various fractions during preparation of EGTA-washed lysed synaptosomal membranes from rat cerebral cortex. CaM content in the final preparation was estimated at lower than 3 μg/mg of membrane protein.
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