Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Glycoproteins are found in cell membraines, plasma and in various secretions. Many plasma proteins have carbohydrates covalently bound to them. Carbohydrate unites will containe hexoses, N-acetylglucoseamine, Nacetylgalactoseamine, fucose and sialic acid (N-acetylneuraminic acid).
Fuller, William and Engen, R. L.
"Plasma Sialic Acid Levels in Normal Beagles,"
Iowa State University Veterinarian: Vol. 33
, Article 9.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol33/iss1/9