Figure 2.

Characterization of highly variable region (HVR). (A) The top rectangular box represents the partial human MUC19 cDNA; the empty portion is the 5′ end, and the patterned potion is the central exon. Both M19RC6 and M19RC7 are 5′ RACE products. Dashed lines indicate the existence of multiple products. (B) Different HVR transcripts. The 13 rectangular boxes represent different exons. The existence of any of those exons is represented by an “X.” Two altered forms of exon 4 are represented by 4′ and 4″, respectively. And one altered form of exon 6 was represented by 6′. The details of those exons are discussed in the Results section and in Table 3.