Unfortunately we do not have an Exon 6 sequencing primer for HLA-A. However, what the customer can try is to use our HLA-A Exon 5 forward sequencing primer (A42) to see whether the read is long enough to get an Exon 6 sequence in the read-through. The read would have to be > 600 bp long (about 100 for Exon 5 + about 500 for Intron 5) and of good quality, but it is worth to give it a try. Alternatively, of course, NGS will solve this ambiguity.