Purity > 85% as determined by SDS-PAGE. MW: 44.2kDa. Partial: 115-473aa. N-terminal 10xHis-tagged and C-terminal Myc-tagged. Newcastle disease virus (strain Her/33) (NDV). Attaches the virus to sialic acid-containing cell receptors and thereby initiating infection. Binding of HN protein to the receptor induces a conformational change that allows the F protein to trigger virion/cell membranes fusion Neuraminidase activity ensures the efficient spread of the virus by dissociating the mature virions from the neuraminic acid containing glycoproteins.