May have a role in axon outgrowth and guidance. H2O + O-phospho-L-tyrosyl-[protein] = L-tyrosyl-[protein] + phosphate Isoform G is produced by readthrough of a stop codon between the codons for Arg-1631 and His-1633. This is likely to be a rare event with most transcripts using the stop codon following Arg-1631. In 9-12 hour embryos, expression is specifically seen in the anterior commissure and its junctions with the longitudinal tracts. Expressed both maternally and zygotically. Expressed throughout development to adulthood, lowest expression is during second and third larval instars. This protein is translated by readthrough of a stop codon. Readthrough of the terminator codon TAG occurs between the codons for Arg-1631 and His-1633. There is currently no sequence that provides the identity of residue 1632. Belongs to the protein-tyrosine phosphatase family. Receptor class subfamily.