Catalysis of the transfer of a group, e.g. a methyl group, glycosyl group, acyl group, phosphorus-containing, or other groups, from one compound (generally regarded as the donor) to another compound (generally regarded as the acceptor). Transferase is the systematic name for any enzyme of EC class 2.

Any process that modulates the frequency, rate or extent of the regulated release of a neurotransmitter from a cell or group of cells.

A cyclic metabolic pathway that converts waste nitrogen in the form of ammonium to urea.

antigen presentation, exogenous antigen via MHC class I

antigen presentation, exogenous antigen via major histocompatibility complex class I

The process by which antigen-presenting cells express foreign antigen on their cell surface as part of the MHC class I for recognition by lymphocytes.

G-protein signaling, coupled to cAMP nucleotide second messenger

G-protein signalling, coupled to cAMP nucleotide second messenger

The series of molecular signals generated as a consequence of a G-protein coupled receptor binding to its physiological ligand, followed by modulation of adenylyl cyclase activity and a subsequent change in the concentration of cyclic AMP.

transferase activity, transferring one-carbon groups

Catalysis of the transfer of a one-carbon group from one compound (donor) to another (acceptor).

The chemical reactions involving any of the intermediate compounds involved in the urea cycle, a cyclic metabolic pathway that converts waste nitrogen in the form of ammonium to urea.

antigen presentation, exogenous antigen via MHC class II

antigen presentation, exogenous antigen via major histocompatibility complex class II

The process by which antigen-presenting cells express foreign antigen on their cell surface as part of the MHC class II for recognition by lymphocytes.

Long whiplike or feathery structures borne either singly or in groups by the motile cells of many bacteria and unicellular eukaryotes and by the motile male gametes of many eukaryotic organisms, which propel the cell through a liquid medium.