Attachment of HUVEC to WT-vWF. Effect of vWF-A1 and the anti-VNR. The anti-VNR MoAb LM609 and 3 μmol/L of the vWF-A1 polypeptide, were added individually or in combination to untreated and cytokine-treated HUVEC and attachment was measured as described above after 60 minutes. Attachment to BSA was measured in parallel and subtracted from all values.