Book excerpt: The past two decades have seen an expansion of interest in glycoproteins. From being a borderline area between carbohydrate and protein chemistry, it has become relevant to a wide range of biological phenomena. The aim of the book is to describe techniques which can be used to answer some of the basic questions about glycosylated proteins. Methods are discussed for isolation; compositional analysis; structure carbohydrate units; protein-carbohydrate linkages, keeping in mind the diverse nature of problems which readers may have to tackle.