Figure 2. Positions of the muscle-specific exons.

A). This map shows the locations of the 29 exons of the human UFD2a gene spread across approximately 200 kb near the telomere on the short arm of chromosome 1. Ubiquitous exons are shown in black. Exon 7, which has been found in fetal brain and striated muscle, is shown in blue. The striated muscle–specific exon 7a is show in red. B). Illustration of the UFD2a protein showing positions of the MPAC domain, catalytic U box, exons 7 and 7a, and the region conserved in lower eukaryotes (light green).