“…However, since initial reports of DQBl typing by PCR-SSP (8)(9)(10)(11)(12), there has been a prodigious expansion of recognized alleles, not all of which can be discriminated by existing methods. In particular, seven DQB1*03 and 13 DQB1*06 alleles have now been described (1, [13][14][15][16][17]. We have improved the methods described by Olerup et al (9), and Bunce et al (8,18), so that all recognized alleles, except for synonymous variants, may be distinguished.…”