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Calcium and phospholipid binding proteins have been identified and localized by immunocytochemistry in a wide range of cells and tissues. Two of these proteins (calpactins) also bind F-actin and are substrates for tyrosine kinases. The similar membrane-binding properties of these molecules arise from conserved amino acid sequences and a model is proposed for the tertiary structure of a common calcium and phospholipid binding domain.
Geisow et al. (Wed,) studied this question.