Nucleotide sequence of exon 1 and 5′ flanking sequence of the human EphA3 gene. Numbering of nucleotides is relative to the transcription initiation site (bolded and below the asterisk) as determined by RACE PCR. For the coding part of exon 1, the amino acid sequence is given above the nucleotide sequence in the one-letter code. The consensus GT of the splice donor is noted (below triangle). The positions of primers (P2-P5) used to identify the transcription initiation site are underlined.