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. Author manuscript; available in PMC: 2011 Dec 2.
Published in final edited form as: Cell. 1990 Oct 5;63(1):97–107. doi: 10.1016/0092-8674(90)90291-l

Table 2.

Underpolytenization of Dp1187

Amount of Underpolytenization ata
Genotype −1.9b −54b −103b
X/O;Dp1187 39 8.0 2.4
X/Y;Dp1187   4.7 2.0 1.0
a

Values indicate the amount of underpolytenization in salivary gland nuclei (fold difference in amount of DNA) when the sequences are present on Dp1187, in comparison with their polytenization on the un-rearranged X chromosome. These values were derived by densitometry of the quantitative Sourthern hybridization analyses reported in Figures 4 and 5. The raw differences in DNA content in the polytene nuclei (SG lanes, Figures 4 and 5) were normalized to the representation of each sequence in the predominantly diploid imaginal disc and brain cells (DB lanes, Figures 4 and 5).

b

Distance in kb from the heterochromatic–euchromatic junction (coordinate 0) to the first restriction site in the euchromatic polymorphisms used to distinguish Dp1187 sequences from those on the X chromosome (see Figures 4).