Fig. 2.

NA-1a and -1b genotyping by PCR-SSP. Lane 3 shows a DNA ladder marker (Bioneer, Daejeon, Korea). The amplification products (439 bp) of the internal control (the HGH gene) is present in every lane. The genotype can be deduced from the presence of amplification products that are specific for HNA-1a (FCGR3B*1, 141 bp) and HNA-1b (FCGR3B*2, 219 bp). The patient had both HNA-1a and HNA-1b, but mother had HNA-1b (lane 5) only.