The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism.

The repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs.

The directed movement of fatty acids into, out of, within or between cells. Fatty acids are aliphatic monocarboxylic acids liberated from naturally occurring fats and oils by hydrolysis.

The directed movement of long-chain fatty acids into, out of, within or between cells. A long-chain fatty acid is an aliphatic compound with a terminal carboxyl group and with a chain length greater than C12.

Catalysis of the preferential cleavage of Arg-Xaa, Lys-Xaa, but with more restricted specificity than trypsin.

Assembly of actin filaments by the addition of actin monomers to a filament.

Disassembly of actin filaments by the removal of actin monomers from a filament.

The formation from simpler components of keratan sulfate, a glycosaminoglycan with repeat units consisting of beta-1,4-linked D-galactopyranosyl-beta-(1,4)-N-acetyl-D-glucosamine 6-sulfate and with variable amounts of fucose, sialic acid and mannose units; keratan sulfate chains are covalently linked by a glycosidic attachment through the trisaccharide galactosyl-galactosyl-xylose to peptidyl-threonine or serine residues.

Covalent modification of an actin molecule.

Movement of organelles or other particles along actin filaments, or sliding of actin filaments past each other, mediated by motor proteins.

The formation of a covalent cross-link between or within protein chains.

Any process involved in the replication of a retroviral genome. Retroviruses use RNA as their nucleic acid and reverse transcriptase to copy their genome into the DNA of the host cells chromosomes.

cell projection organization and biogenesis

cell surface structure organization and biogenesis

The assembly and arrangement of a prolongation or process extending from a cell, e.g. a flagellum or axon.