Figure 1: SSCP patterns of common as well as variant ABO alleles. Fig. (A) shows the single strand conformational polymorphism (SSCP) patterns of different homozygous and heterozygous ABO alleles (Lane1-10: A2B, A1B, O1O2, A2O2, BO2, O2OIV, OIVOIV, O1O1, BB & A1A1). Fig. (B) shows the normal SSCP pattern of ABO alleles (lane 1, 3, 4) Lane 2: Atypical pattern of O variant allele. Fig. (C) shows the normal SSCP pattern of ABO alleles (lane 1, 2, 4) with atypical pattern of A variant allele (lane-3).