Chromosomal localization of HRAD9
to 11q13.1–11q13.2. (A) Cy3-labeled genomic
HRAD9 was hybridized to methotrexate-synchronized normal
human lymphocyte metaphase preparations. The white dual chromatid
signals are localized to 11q13 (counterstain
4′,6-diamidino-2-phenylindole/actinomycin D). (Inset)
Enlarged version of chromosome 11 from two different metaphase spreads.
(B) DNA sequence analysis of the HRAD9
genomic clone used in FISH analysis identifies the location of an
intron. The location of the primers used for PCR in sections
C and D are indicated. (C) PCR
analysis using total human, mouse, or hamster genomic DNA, or DNA
isolated from somatic cell hybrids containing a single human chromosome
only, as indicated. This confirms the chromosomal location indicated by
FISH analysis. (D) PCR analysis sublocalizes
HRAD9 to 11q13.1–11q13.2, as the genomic DNA is absent
in a somatic cell hybrid containing 11q13.3–11q ter (11936), and
present in three hybrids bearing the 11q13.1–11q13.2 region (11943,
13400, and 10482). Arrows to the left of C and D
indicate position of relevant DNA fragments.