Differential activation of LFA-1 and Mac-1 ligand binding domains.


Nine integrin alpha subunits contain an 'inserted' or I-domain, known to involve in ligand binding. Mutation of an invariant isoleucine residue in the I-domains of alphaL and alphaM has previously been reported to activate LFA-1 and Mac-1, respectively. In this article, we report notable differences in the regulation of adhesion of these two integrins. We… (More)


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