Catalysis of the reaction: NADP+ + 4,4-dimethyl-5-alpha-cholesta-8,24-dien-3-beta-ol = NADPH + H+ + 4,4-dimethyl-5-alpha-cholesta-8,14,24-trien-3-beta-ol.

Progression through prophase, the first stage of chromosome segregation in the cell cycle. Canonically, chromosomes condense and the two daughter centrioles and their asters migrate toward the poles of the cell.

Progression through interphase, the stage of cell cycle between successive rounds of chromosome segregation. Canonically, interphase is the stage of the cell cycle during which the biochemical and physiologic functions of the cell are performed and replication of chromatin occurs.

Progression through telophase, the last stage of chromosome segregation in the cell cycle. Canonically, telophase begins when the chromosomes arrive at the poles of the cell and the division of the cytoplasm starts.

Progression through M phase, the part of the meiotic cell cycle during which meiosis and cytokinesis take place.

Progression through interphase, the stage of cell cycle between successive rounds of mitosis. Canonically, interphase is the stage of the cell cycle during which the biochemical and physiologic functions of the cell are performed and replication of chromatin occurs.

Catalysis of the hydrolysis of ester linkages within ribonucleic acids by creating internal breaks to yield 5'-phosphomonoesters.

Catalysis of the reaction: ATP + riboflavin = ADP + FMN.

endoribonuclease activity, producing other than 5'-phosphomonoesters

Catalysis of the hydrolysis of ester linkages within ribonucleic acids by creating internal breaks to yield 3'-phosphomonoesters.

regulation of tyrosine phosphorylation of Stat5 protein

Any process that modulates the frequency, rate or extent of introducing a phosphoric group to a tyrosine residue of a Stat5 protein.

Catalysis of the reaction: UDP-N-acetyl-D-glucosamine + beta-D-galactosyl-1,4-N-acetyl-D-glucosaminyl-R = UDP + N-acetyl-beta-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-N-acetyl-D-glucosaminyl-R.