[i] (SP) signal peptide; (TM) transmembrane domain; (TK) tyrosine kinase domain; (ND) not determined; (SERF) short extracellular region family; (LERF) long extracellular region family.

[ii] (Cloned) Complete cDNA sequence is found in databases; (EST) partial sequence is found in databases; (RT–PCR) we showed the existence of mRNA by RT–PCR; (NP) no proof of mRNA exist.

[iii] Corrected after RT–PCR study.

[iv] As predicted by GENEFINDER.

[v] Sequences derived from W04G5.6 predicted protein.

[vi] Accession no. for W04G5.6.

[vii] See Methods.