Identification of residues Asn89, Ile90, and Val107 of the factor IXa second epidermal growth factor domain that are essential for the assembly of the factor X-activating complex on activated platelets.

Abstract excerpt

Activated platelets promote intrinsic factor X-activating complex assembly by presenting high affinity, saturable binding sites for factor IXa mediated by two disulfide-constrained loop structures (loop 1, Cys88-Cys99; loop 2, Cys95-Cys109) within the second epidermal growth factor (EGF2) domain. To identify amino acids essential for factor X activation complex assembly, recombinant factor IXa point mutants in...

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