An endocytosis process in which cell surface receptors ensure specificity of transport. A specific receptor on the cell surface binds tightly to the extracellular macromolecule (the ligand) that it recognizes; the plasma-membrane region containing the receptor-ligand complex then undergoes endocytosis, forming a transport vesicle containing the receptor-ligand complex and excluding most other plasma-membrane proteins. Receptor-mediated endocytosis generally occurs via clathrin-coated pits and vesicles.

The directed movement of proteins into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

OBSOLETE. (Was not defined before being made obsolete).

The directed movement of a motile cell or organism in response to the presence of arachidonic acid.

The directed movement of a motile cell or organism, or the directed growth of a cell guided by a specific chemical concentration gradient. Movement may be towards a higher concentration (positive chemotaxis) or towards a lower concentration (negative chemotaxis).

The process by which, after initial infection, a virus lies dormant within a cell and viral production ceases. The process ends when the virus switches from latency and starts to replicate.

OBSOLETE. (Was not defined before being made obsolete).

A structure lying between the capsid and envelope of a virus, varying in thickness and often distributed asymmetrically.

An electron-dense acidic membrane-bounded organelle which contains a matrix of pyrophosphate and polyphosphates with bound calcium and other cations.

Specific locations and structures in the virus infected cell involved in replicating the viral genome.

Vacuole within a parasite used for digestion of the host cell cytoplasm. An example of this component is found in the Apicomplexa.

A membrane-bounded intracellular vesicle formed by maturation of an early phagosome following the ingestion of particulate material by phagocytosis; during maturation, phagosomes acquire markers of late endosomes and lysosomes.

A nucleoprotein complex containing viral genetic material and the viral integrase, required for genome integration into the host's genome. May contain other proteins.

Singlet microtubule that lie underneath the inner membrane pellicle complex and emanate from the basal ring of the conoid.

Any of the long, generally straight, hollow tubes of internal diameter 12-15 nm and external diameter 24 nm found in a wide variety of eukaryotic cells; each consists (usually) of 13 protofilaments of polymeric tubulin, staggered in such a manner that the tubulin monomers are arranged in a helical pattern on the microtubular surface, and with the alpha/beta axes of the tubulin subunits parallel to the long axis of the tubule; exist in equilibrium with pool of tubulin monomers and can be rapidly assembled or disassembled in response to physiological stimuli; concerned with force generation, e.g. in the spindle.

Specific locations and structures in the virus infected cell involved in transcribing the viral genome.

Specific locations and structures in the virus infected cell involved in assembling new virions.

Electron-dense organelle with a granular internal matrix found throughout the merozoite life cycle stage of apicomplexan parasites; contains proteins destined to be secreted into the parasitophorous vacuole following parasite invasion of a host cell.