Table 1.

Antibodies directed against HOS3 are able to specifically immunoprecipitate deacetylase activity from nuclear extracts

Yeast strain	Anti-HOS3	Anti-HDA1	Anti-RAP1	Beads alone
Wild type	1,140	5,888	191	108
hos3Δ	131	6,052	147	171

Activity is given as total cpm release from 50,000 cpm total [³H]acetyl Hela histones. Extracts were prepared, immunoprecipitated, and assayed as described previously (1).