Figure 2.

Alternative variants and their tissue distribution. The sequences of insertions A (A) and B (B) are shown in bold, and corresponding amino acids are indicated. RT-PCR was performed using RNA isolated from the tissues indicated to analyze expression of insertion A (C) and B (D). −, absence of reverse transcriptase; − −, absence of template. The structure of the PCR products is indicated on the left of C and D. Marker: pBr322 DNA MspI digest.