Table 1. The 20 most common protein domains in C. elegans (41). RRM, RNA recognition motif; RBD, RNA binding domain; RNP, ribonuclear protein motif; UDP, uridine 5'-diphosphate.
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Number Description
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650 7 TM chemoreceptor
410 Eukaryotic protein kinase domain
240 Zinc finger, C4 type (two domains)
170 Collagen
140 7 TM receptor (rhodopsin family)
130 Zinc finger, C2H2 type
120 Lectin C-type domain short and long forms
100 RNA recognition motif (RRM, RBD, or RNP domain)
 90 Zinc finger, C3HC4 type (RING finger)
 90 Protein-tyrosine phosphatase
 90 Ankyrin repeat
 90 WD domain, G-beta repeats
 80 Homeobox domain
 80 Neurotransmitter-gated ion channel
 80 Cytochrome P450
 80 Helicases conserved C-terminal domain
 80 Alcohol/other dehydrogenases, short-chain type
 70 UDP-glucoronosyl and UDP-glucosyl transferases
 70 EGF-like domain
 70 Immunoglobulin superfamily