A decrease in a behavioral response to a repeated stimulus. This is exemplified by the failure of a person to show a startle response to a loud noise that has been repeatedly presented.

Catalysis of the reaction: alpha-keto ester + 2 H+ (from donor) = (R)-hydroxy ester. Alpha-keto esters are of the form R(1)-CO-CO-O-R(2), where the R groups may be aromatic or aliphatic.

Prevention of degradation of RNA molecules.

Catalysis of the reaction: 2-amino-3-(3-oxoprop-2-enyl)-but-2-enedioate = 2-aminomuconate semialdehyde + CO2.

Interacting selectively with tapasin, a member of the MHC class I loading complex which bridges the TAP peptide transporter to class I molecules.

Enables the directed movement of beta-alanine, 3-aminopropanoic acid, into, out of, within or between cells.

negative regulation of lymphocyte activation

Any process that stops, prevents or reduces the rate, frequency or extent of lymphocyte activation.

Catalysis of the transfer of N-acetylglucosamine (GlcNAc) in a beta-1,3 linkage to the mannose(beta-1,4)Glc disaccharide core of glycolipids.

The directed movement of beta-alanine, 3-aminopropanoic acid, into, out of, within or between cells.

positive regulation of lymphocyte activation

Any process that activates or increases the rate, frequency or extent of lymphocyte activation.

Interacting selectively with a nonidentical protein to form a heterodimer.

The process by which the anatomical structures of branches are generated and organized. Morphogenesis pertains to the creation of form. A branch is a division or offshoot from a main stem. Examples in animals would include blood vessels, nerves, lymphatics and other endothelial or epithelial tubes.

Any process that modulates the frequency, rate or extent of the chemical reactions involving RNA.

The formation of a protein dimer, a macromolecular structure consists of two noncovalently associated identical or nonidentical subunits.

The characteristic movement of immature neurons from germinal zones to specific positions where they will reside as they mature.