Figure 5.

Sequences of the authentic and alternative first exons, and the second exon of δ-SG gene. The primers used in primer-extension experiment (PE), PCR (exIF, alexIF, alexIR, exIIF, exIIR1, and exIIR2), and 5′ RACE (M1 and M2) are located by arrows. (Upper Left) The authentic first exon of δ-SG. The major transcription initiation site in the LV of normal hamsters is located at position +1 in the sequence. One of the several binding sequences for Sp1 is boxed. (Lower Left) The alternative first exon of δ-SG. (Right) The sequences for the second exon and the deduced amino acids for δ-SG. The single transmembrane domain (TMD) and one of the three potential N-glycosylation sites are indicated by a box and an asterisk, respectively.