Table 2.

Distributions and relative intensities of HDAC1 at PSC sites on polytene chromosomes

2D	++	26E	−	59F	−	84D	+
4C	−	28A	−	61A	++	84E	++
5A	+	32EF	+	61C	+	84F	+
8A	+	33F	−	61F	++	86C	−
8B	+	35AB	++	63E	+	88A	−
8D	++	35DE	+	65D	−	89C	+
8F/9A	+	37A	+	69C	++	89E	+
11A	++	38F	+	69D	−	90E	−
11B	++	42A	+	70A	++	93E	−
14B	−	44A	+	70D	+	94EF	+
21AB	+	48A	−	76C	−	96B/C	++
22A	++	49EF	++	77E	+	98D	++
22B	+	51C	+	82E	+++	99A	++
24A	+	56C	++	83C	++	100A	−
25E	−	57B	−	84AB	+	100B	+

The major PSC sites detected by a combination of monoclonal antibodies 1F4 and 6E8 are listed. Note that there are some differences between our list and the sites previously published (40). The bold, plain, and italicized letters indicate major, minor, and sites undetected by the earlier work, respectively. The relative staining intensity of HDAC1 at these sites is indicated by the number of “+.” The absence of HDAC1 staining is indicated by “−.”