Hybridization of interspersed repetitive sequence probes to female mouse metaphase chromosome spreads. Except where indicated,
the fluorescein isothiocyanate signal is displayed white and the propidium iodide counterstain red. (A) Hybridization with biotinylated KS13A,
a clone containing a 1.3-kb DNA fragment from the midregion of the Li repeat. (B) Karyotype prepared from the metaphase spread in A; note
the absence of centromere labeling. (C) Hybridization of biotinylated B1 sequence to mouse chromosomes. (D) Digitized image of chromosome
7 from B aligned with an idiogram of chromosome 7; only major bands are indicated. (E) Simultaneous hybridization of biotinylated Li probe,
detected with fluorescein isothiocyanate-avidin and digoxigenin-labeled MaG-6, detected with Texas red-conjugated antibodies. Fluorescein
isothiocyanate is shown as green, Texas red as red, and the 4',6-diamidino-2 phenylindole counterstain as blue. Arrow indicates the prominent
E band on chromosome X. The homologous chromosomes 3, each with a signal on both chromatids, are enlarged in the lower right corner. (F)
Comparison of Giemsa (left)- and Li (right)-banding patterns for chromosomes 1-7. Band positions are nearly identical in each case, although
band intensities on chromosome 7 differ when using the two methods. Giemsa-banded chromosomes were reproduced with permission from
Evans (ref. 23; copyright Oxford University Press). (G) Chromosomes 1-5 and 11. The left member of each pair is hybridized with Li probe,
and the right chromosome is decorated with B2 probe. Note the reverse banding patterns, which are especially evident on chromosome