OBSOLETE. (Was not defined before being made obsolete).

Combining with benzodiazepines, a class of drugs with hypnotic, anxiolytic, anticonvulsive, amnestic and myorelaxant properties, to initiate a change in cell activity.

Combining with melatonin, N-acetyl-5-methoxytryptamine, to initiate a change in cell activity. Melatonin is a neuroendocrine substance that stimulates the aggregation of melanosomes in melanophores, thus lightening the skin.

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: iodide(out) + Na+(out) = iodide(in) + Na+(in).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: sucrose(out) + H+(out) = sucrose(in) + H+(in).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: bile acid(out) + Na+(out) = bile acid(in) + Na+(in).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + HCO3-(out) = Na+(in) + HCO3-(in).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Na+(out) + K+(out) + Cl-(out) = Na+(in) + K+(in) + Cl-(in).

Enables the transfer of organic cations from one side of a membrane to the other, up the solute's concentration gradient. The transporter binds the solute and undergoes a series of conformational changes. Transport works equally well in either direction.

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: Folate derivative (out) + anion (in) = folate derivative (in) + anion (out). The Reduced Folate Carrier (RCF(SLC19A1) acts by an antiport mechanism. RCF carries several folate derivatives: MTX, PMX, ratitrexed, pralatrexate, 5-methyl THF, and 5-formyl THF.

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: L-ascorbate(out) + Na+(out) = L-ascorbate(in) + Na+(in).

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: multivitamin(out) + Na+(out) = multivitamin(in) + Na+(in). Multivitamins include pantothenate, biotin and lipoate.

Removes phosphatidylinositol from a membrane or a monolayer lipid particle, transports it through the aqueous phase while protected in a hydrophobic pocket, and brings it to an acceptor membrane or lipid particle.

OBSOLETE. Combining with an intracellular peptide to initiate a change in cell activity.

OBSOLETE. Combining with an extracellular peptide to initiate a change in cell activity.

Catalysis of the reaction: UDP-N-acetyl-D-glucosamine + beta-D-galactosyl-1,4-N-acetyl-D-glucosaminyl-R = UDP + N-acetyl-beta-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-N-acetyl-D-glucosaminyl-R.

Catalysis of the reaction: ATP + riboflavin = ADP + FMN + 2 H(+).