Figure 4From: A survey of putative secreted and transmembrane proteins encoded in the C. elegans genomeGrouping of transmembrane proteins. Three major groups of transmembrane proteins are proteins without any additional predicted domains, proteins with additional domains, and serpentine-type GPCR (putative chemoreceptors). Proteins with additional domains are further divided into broad functional categories (see main text for a detailed description of the categories).Back to article page