EOG88PQ0W GO:0006633 27/107 fatty acid biosynthetic process biological_process "The chemical reactions and pathways resulting in the formation of a fatty acid, any of the aliphatic monocarboxylic acids that can be liberated by hydrolysis from naturally occurring fats and oils. Fatty acids are predominantly straight-chain acids of 4 to 24 carbon atoms, which may be saturated or unsaturated; branched fatty acids and hydroxy fatty acids also occur, and very long chain acids of over 30 carbons are found in waxes." [GOC:mah, ISBN:0198506732] EOG88PQ0W GO:0016705 27/107 oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen molecular_function "Catalysis of an oxidation-reduction (redox) reaction in which hydrogen or electrons are transferred from each of two donors, and molecular oxygen is reduced or incorporated into a donor." [GOC:mah] EOG88PQ0W GO:0016021 27/107 integral component of membrane cellular_component "The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane." [GOC:dos, GOC:go_curators] EOG88PQ0W GO:0006629 4/107 lipid metabolic process biological_process "The chemical reactions and pathways involving lipids, compounds soluble in an organic solvent but not, or sparingly, in an aqueous solvent. Includes fatty acids; neutral fats, other fatty-acid esters, and soaps; long-chain (fatty) alcohols and waxes; sphingoids and other long-chain bases; glycolipids, phospholipids and sphingolipids; and carotenes, polyprenols, sterols, terpenes and other isoprenoids." [GOC:ma] EOG88PQ0W GO:0016006 1/107 Nebenkern cellular_component "A product of the fusion of the mitochondria during spermatogenesis. After the completion of meiosis the mitochondria of the spermatid collect along side the nucleus and fuse into two masses; these wrap around each other to produce the spherical Nebenkern. During flagellum elongation the Nebenkern unfolds and the two derivatives (major and minor mitochondrial derivatives) elongate down the axoneme." [GOC:ma] EOG88PQ0W GO:0042284 1/107 sphingolipid delta-4 desaturase activity molecular_function "Catalysis of the introduction of a trans double bond between C4 and C5 of the long chain base region of a sphingolipid. Sphingolipids are composed of a long chain base (LCB) amide-linked to a very long chain fatty acid." [PMID:12417141] EOG88PQ0W GO:0007053 1/107 spindle assembly involved in male meiosis biological_process "The aggregation, arrangement and bonding together of a set of components to form the spindle during a meiotic cell cycle in males. An example of this is found in Drosophila melanogaster." [GOC:mah] EOG88PQ0W GO:0070938 1/107 contractile ring cellular_component "A cytoskeletal structure composed of filamentous protein that forms beneath the membrane of many cells or organelles, in the plane of cell or organelle division. Ring contraction is associated with centripetal growth of the membrane that divides the cytoplasm of the two daughter cells or organelles." [GOC:mah, ISBN:0123645859, ISBN:0792354923, PMID:10791428, PMID:17913889] EOG88PQ0W GO:0005886 1/107 plasma membrane cellular_component "The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins." [ISBN:0716731363] EOG88PQ0W GO:0005739 1/107 mitochondrion cellular_component "A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration." [GOC:giardia, ISBN:0198506732] EOG88PQ0W GO:0007283 1/107 spermatogenesis biological_process "The process of formation of spermatozoa, including spermatocytogenesis and spermiogenesis." [GOC:jid, ISBN:9780878933846] EOG88PQ0W GO:0004768 1/107 stearoyl-CoA 9-desaturase activity molecular_function "Catalysis of the reaction: stearoyl-CoA + 2 ferrocytochrome b5 + O2 + 2 H+ = oleoyl-CoA + 2 ferricytochrome b5 + H2O." [EC:1.14.19.1]