NADH dehydrogenase complex (ubiquinone) (sensu Eukaryota)

A part of the respiratory chain, containing about 25 different polypeptide subunits, including NADH dehydrogenase (ubiquinone), flavin mononucleotide and several different iron-sulfur clusters containing non-heme iron; the iron undergoes oxidation-reduction between Fe(II) and Fe(III). Catalyzes proton translocation linked to the oxidation of NADH by ubiquinone. As in, but not restricted to, the eukaryotes (Eukaryota, ncbi_taxonomy_id:2759).

respiratory chain complex II (sensu Eukaryota)

succinate dehydrogenase complex (ubiquinone) (sensu Eukaryota)

A part of the respiratory chain, containing the four polypeptide subunits of succinate dehydrogenase, flavin-adenine dinucleotide and iron-sulfur. Catalyzes the oxidation of succinate by ubiquinone. Connects the TCA cycle with the respiratory chain. As in, but not restricted to, the eukaryotes (Eukaryota, ncbi_taxonomy_id:2759).

Catalysis of the reaction: ATP + (d)UMP = ADP + (d)UDP.

A small, dense body one or more of which are present in the nucleus of eukaryotic cells. It is rich in RNA and protein, is not bounded by a limiting membrane, and is not seen during mitosis. Its prime function is the transcription of the nucleolar DNA into 45S ribosomal-precursor RNA, the processing of this RNA into 5.8S, 18S, and 28S components of ribosomal RNA, and the association of these components with 5S RNA and proteins synthesized outside the nucleolus. This association results in the formation of ribonucleoprotein precursors; these pass into the cytoplasm and mature into the 40S and 60S subunits of the ribosome.

A complex composed of RNA of the small nucleolar RNA (snoRNA) and protein, found in the nucleolus of a eukaryotic cell. Most are involved in a step of processing of rRNA: cleavage, 2'-O-methylation, or pseudouridylation. The majority, though not all, fall into one of two classes, box C/D type or box H/ACA type.

Catalysis of the hydrolysis of 1,4-beta-D-xylans so as to remove successive D-xylose residues from the non-reducing termini.