ARH protein with PTB domain:
Gene structure (A),
predicted amino acid sequence
(B), and location
of mutations in ARH protein
(C). (A) ARH is encoded
by nine exons and
spans ~25 kb. Filled rectangles,
exons; lines, introns.
(B) The predicted
amino acid sequences of
human, mouse, and Xenopus
ARH. Numbers to the
right correspond to human
sequence. The alignment
of the inferred amino
acid sequences displays 67% identity among the three proteins. The regions of amino acid
identity are boxed. ARH has a highly conserved PTB domain at the amino terminus (indicated by
blue shading, 89% identity). (C) Schematic
representation of ARH showing the location of the mutations identified in this study.