Demonstration of a receptor on rabbit neutrophils for chemotactic peptides

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Abstract

[3H]formylNorleu-Leu-Phe, a potent leucocyte chemoattractant, binds specifically to a site on rabbit neutrophils with an affinity of 1.5 × 10−9 M. Other acylated peptide chemoattractants displace this binding at concentrations closely related to those levels required to elicit chemotaxis. The binding fulfills the major criteria for demonstration of specific receptor sites and indicates that a natural bacterial product and synthetic formyl-peptides produce chemotaxis by the same receptor mechanism.

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