– Forms spikes that protrude from each vertex of the icosahedral capsid. Interacts with host receptor CD46 to provide virion initial attachment to target cell. Fiber proteins are shed during virus entry, when virus is still at the cell surface. Human adenovirus B serotype 11 (strain BC34) Fiber protein (His) is expressed in E. coli expression system with N-6xHis tag. The predicted molecular weight is 40.6 kDa and the accession number is P35773.