Catalysis of the reaction: lactose + H2O = D-glucose + D-galactose.

eukaryotic elongation factor-2 kinase regulator activity

Modulates the activity of the enzyme eukaryotic elongation factor-2 kinase.

Enables the directed movement of phosphatidylinositol into, out of, within or between cells. Phosphatidylinositol refers to any glycophospholipids with its sn-glycerol 3-phosphate residue is esterified to the 1-hydroxyl group of 1D-myo-inositol.

transforming growth factor beta receptor, inhibitory cytoplasmic mediator activity

TGFbeta receptor, inhibitory cytoplasmic mediator activity

A TGFbeta cytoplasmic mediator that inhibits the signaling function of common-partner and pathway-specific mediators.

negative regulation of cellular biosynthesis

Any process that stops, prevents or reduces the rate of the transformation of simpler substances into more complex ones, carried out by individual cells.

eukaryotic elongation factor-2 kinase activator activity

Increases the activity of the enzyme eukaryotic elongation factor-2 kinase.

The process by which an organism retains a population of stem cells, preventing the commitment of all stem cell progeny to a differentiated cell fate.

Any process that modulates the frequency, rate or extent of lymphocyte proliferation.

Catalysis of the hydrolysis of nonterminal peptide linkages in oligopeptides or polypeptides; the optimum reaction pH is below 5 due to an aspartic residue involved in the catalytic process.

positive regulation of cellular biosynthesis

Any process that activates or increases the rate of the transformation of simpler substances into more complex ones, carried out by individual cells.

Any process that modulates the frequency, rate or extent of DNA recombination, the processes by which a new genotype is formed by reassortment of genes resulting in gene combinations different from those that were present in the parents.

The chemical reactions involving any compound containing pteridine (pyrazino(2,3-dipyrimidine)), e.g. pteroic acid, xanthopterin and folic acid.