Combining with melanocyte stimulating hormone to initiate a change in cell activity.

A-type (transient outward) potassium channel activity

delayed rectifier potassium channel activity

Combining with an N-formyl peptide to initiate a change in cell activity.

Combining with neuropeptide Y to initiate a change in cell activity.

Combining with airborne compounds to initiate a change in cell activity. These receptors are used for the sense of smell.

Combining with an opioid, any narcotic derived from or resembling opium, to initiate a change in cell activity.

Catalysis of the reaction: GDP-L-fucose + beta-D-galactosyl-(1,3)-N-acetyl-D-glucosaminyl-R = GDP + beta-D-galactosyl-(1,3)-[alpha-L-fucosyl-(1,4)]-N-acetyl-D-glucosaminyl-R.

Catalysis of the reaction: 5'-methylthioadenosine + phosphate = adenine + 5-methylthio-D-ribose 1-phosphate.

Combining with glutamate to initiate a change in cell activity through the regulation of ion channels.

Interacting selectively with a small nuclear RNA (snRNA).

alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate selective glutamate receptor activity

N-methyl-D-aspartate selective glutamate receptor activity

Catalysis of the reaction: amino acid(out) + Na+(out) = amino acid(in) + Na+(in).

Combining with a leukotriene to initiate a change in cell activity. Leukotrienes are pharmacologically active substances with a set of three conjugated double bonds; some contain a peptide moiety based on cysteine.

Catalysis of the stereospecific transfer of basic amino acids, amino acids with a pH greater than 7, across a biological membrane.

Combining with melanocortin to initiate a change in cell activity.

Catalysis of the reaction: sphingosine + ATP = sphingosine 1-phosphate + ADP.

Combining with adrenocorticotropin to initiate a change in cell activity.

The formation from simpler components of phosphatidylinositol, any glycophospholipid with its sn-glycerol 3-phosphate residue is esterified to the 1-hydroxyl group of 1D-myo-inositol.

The chemical reactions involving glycerol ethers, any anhydride formed between two organic hydroxy compounds, one of which is glycerol.