Figure 8: Model of sDscamβ isoform expression.
From: A large family of Dscam genes with tandemly arrayed 5′ cassettes in Chelicerata
Symbols used are the same as in Fig. 1. Each variable cassette was preceded by a promoter. The expression of the specific combination of sDscam isoforms was achieved by alternative promoter activation, followed by alternative splicing. When sDscamβ was transcribed by a given promoter preceding a variable cassette (V1), both V1 and the downstream variable cassettes (V2, V3) could be spliced into the constant exon 5.
