Nitrophorin-4

UniProtKB accession:  Q94734

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UniProtKB description:  Heme-based protein that delivers nitric oxide gas (NO) to the victim while feeding, resulting in vasodilation and inhibition of platelet aggregation. Reversibly binds nitric oxide (NO) (PubMed:7721773). Also binds tightly to histamine, which is released by the host to induce wound healing. NO release is pH dependent and linked to loop dynamics.