An area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell formed through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and the target cell and facilitating activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.

The change in morphology and behavior of a dendritic cell resulting from exposure to a cytokine, chemokine, cellular ligand, or soluble factor.

The directed orientation of natural killer cell signaling molecules and associated membrane rafts towards a chemokine gradient or a contact point with a cell displaying natural killer cell activating ligands.

The directed orientation of lymphocyte signaling molecules and associated membrane rafts towards a chemokine gradient or a contact point with an appropriate activating cell.

The formation of an area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and target cell, which facilitates activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.

Catalysis of the reaction: 2 glutathione + H(+) + methylarsonate = glutathione disulfide + H(2)O + methylarsonous acid.

Catalysis of an oxidation-reduction (redox) reaction in which a phosphorus- or arsenic-containing group acts as a hydrogen or electron donor and reduces a disulfide.

Catalysis of the reaction: (3Z)-phytochromobilin + oxidized ferredoxin = biliverdin IXa + reduced ferredoxin.

Catalysis of an oxidation-reduction (redox) reaction in which a CH-CH group acts as a hydrogen or electron donor and reduces an iron-sulfur protein.

Catalysis of the reaction: 17-O-acetylnorajmaline + NADP(+) = 1,2-dihydrovomilenine + H(+) + NADPH.

Catalysis of the reaction: loganin + NADPH + H+ + O2 = secologanin + NADP+ + 2 H2O.

Catalysis of the reaction: 15,16-dihydrobiliverdin + oxidized ferredoxin = biliverdin IXa + reduced ferredoxin.

Catalysis of the reaction: (3Z)-phycoerythrobilin + oxidized ferredoxin = 15,16-dihydrobiliverdin + reduced ferredoxin.

The directed orientation of B cell signaling molecules and associated membrane rafts towards a chemokine gradient of a contact point with an antigen displaying cell.

The directed orientation of T cell signaling molecules and associated membrane rafts towards a chemokine gradient or a contact point with antigen presenting cell.

Enables the transfer of beta-alanine from one side of a membrane to the other. Beta-alanine is 3-aminopropanoic acid.

The directed movement of beta-alanine, 3-aminopropanoic acid, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

Catalysis of the reaction: 2-amino-3-carboxymuconate 6-semialdehyde + H(+) = 2-aminomuconate 6-semialdehyde + CO(2).

Catalysis of the reaction: retinal + NAD+ + H2O = retinoate + NADH. Acts on both 11-trans and 13-cis forms of retinal.

The formation of mesodermal clusters that are arranged segmentally along the anterior posterior axis of an embryo.