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Fig. 6. Mapping the Steel (KitlSl) deletion.
(A) The exact positions of the 5'- and 3'-breakpoints of
KitlSl are indicated as boxed nucleotides, 1 (position
99,177,807) and 2 (position 100,151,173). The total deletion is 973,366 bp,
not including an insert of four nucleotides. Nucleotide positions correspond
to NCBI Map Viewer numbers. (B) A genotyping strategy was designed to
identify wild-type and deleted alleles of Steel. (Top) The blue line
represents DNA containing the Steel gene, and the dotted region represents the
portion that is missing in the deleted allele. The red arrows represent
primers (see Materials and methods). (Bottom) A gel showing a genotyping
reaction using a mix of all three primers. Heterozygotes are identifiable by
bands generated from both 1+2 and 1+3.