HLA Typing using SSP Primers: L, 50 base pair ladder, A: GAPDH (internal Control), B: different HLA DRB1 alleles. Lane 1: HLA DRB1* 0701-02, Lane 2: HLA DRB1* 1001, Lane 3: HLA DRB1* 1101-04, Lane 4: HLA DRB1* 1201-02, Lane 5: HLA DRB1* 1301-04.