UASt regulatory sequences drive expression of full-length Cpsf6 cDNA (LD25239) with mutations of all 14 phosphorylatable sites to alanine (Serines 459, 468, 525, 527, 531, 541, 543, 549, 571, 573, 588, 596, 622, and Threonine 404), tagged with 3xTag:HA.