According to the authors, "Because a full-length chick cntn3 sequence was not available in GenBank, we generated a cDNA encoding a chimeric protein by fusing 381 nt of 5′ and 102 nt of 3′ mouse cntn3 sequence to the central 2601 nt of chick cntn3." As information provided was insufficient to verify exact sequence used to synthesize probe, the sequence was obtained from NCBI (acc# XM_414433.3).