Catalysis of the reactions: reduced ferredoxin + NAD+ = oxidized ferredoxin + NADH + H+ and reduced ferredoxin + NADP+ = oxidized ferredoxin + NADPH + H+.

Interacting selectively with an antigen peptide, a fragment of a foreign protein derived by proteolysis within the cell.

Interacting selectively with an antigen peptide, a fragment of an endogenous foreign protein, derived by proteolysis within the cell.

Interacting selectively with an antigen peptide, a fragment of an exogenous foreign protein derived by endocytosis of the protein and proteolysis within the cell.

Interacting selectively with a T cell receptor, the antigen-recognizing receptor on the surface of T cells.

Interacting selectively with a CD4, a receptor found on the surface of T cells, monocytes and macrophages.

channel or pore class transporter activity

Allows facilitated diffusion (by an energy-independent process) by passage through a transmembrane aqueous pore or channel without a carrier-mediated mechanism. They do not exhibit stereospecificity but may be specific for a particular molecular species or class of molecules.

Allows the movement of solutes by energy-independent process by passage through a transmembrane aqueous pore. Usually consist of alpha-helical membrane spanners, although beta-strands may be present and contribute to channel.

Catalysis of the reaction: ATP + H2O + H+(in) + K+(out) = ADP + phosphate + H+(out) + K+(in).

Catalysis of the reaction: 2 reduced ferredoxin + 2 H+ = 2 oxidized ferredoxin + H2.

Catalysis of the reaction: ATP + 4-amino-2-methyl-5-hydroxymethylpyrimidine = ADP + 4-amino-2-methyl-5-phosphomethylpyrimidine.

Interacting selectively with heme, any compound of iron complexed in a porphyrin (tetrapyrrole) ring.

Catalysis of the transfer of a phosphate group from GTP or GDP to a mannose molecule.

Catalysis of the integration of lambdoid phage DNA during establishment, probably by forming a transient DNA-protein link.

apoptogenic cytochrome c release channel activity

Catalysis of the reaction: fructose(out) = fructose(in).