Functional classification of identified N-glycoproteins. (A) Analysis of transmembrane domains, GPI-anchors, and secretion of glycoproteins by multiple programs. (B) Gene ontology analysis of identified glycoproteins. Gene ontology of glycoproteins was analyzed using bioinformatics tools and categorized into 3 groups (cellular component, molecular function, and biological process). Membrane, integral to membrane, and plasma membrane GO terms are significantly enriched. Furthermore, the molecular function and biological process GO terms are selectively listed, with a focus on protein classes with functions associated with the sensing of stimuli and transduction of signals at the membrane.