According to the authors, "The cDNA clones used to generate in situ probes for EphA3, EphA4, ephrin-A5, ephrin-A2, EphB2, EphB3, ephrin-B1, ephrin-B2 or RCS, which recognizes a viral core protein, were described elsewhere (Schulte et al., 1999) or were gifts from J. Flanagan, C. Cepko (Harvard Medical School, Boston), or E. Pasquale (The Burnham Institute, La Jolla, California; Holash and Pasquale, 1995 and Cheng et al., 1995). As information provided was insufficient to verify exact sequence used to synthesize probe, the sequence below was obtained from NCBI (acc # NM_204781)
Authors indicated The EphA4 fragment amplified by primers EphA4-F1 (5'-GAGCTCTTCGTGGCATCGGCTCAGGA-3') and EphA4-R1 (5'-GAATTCCTGGAGCTCTCGCTGCCTGT-3') was subcloned between the EcoRI and SacI sites of pBluescript II SK +.NCBI NM_204781.1
Insufficient information provided in publication to verify exact sequence used to synthesize probe. Sequence below was obtained from NCBI (NM_204781.1). Cek-8 is also known as ephrin type-A receptor 4.