For bovine coronavirus ( BCoV ) and related viruses , binding to cell surface components <*> is essential for initiation of an infection .
These viruses resemble influenza C viruses
For bovine coronavirus ( BCoV ) and related viruses , binding to cell surface components containing N -acetyl-9-O - acetylneuraminic acid is essential for initiation of an infection .
These viruses resemble influenza C viruses because they share not only the receptor determinant , but also the presence of an acetylesterase that releases the 9-O - acetyl group from sialic acid and thus abolishes the ability of the respective sialoglycoconjugate to function as a receptor for BCoV.