Combining with UTP or UDP to initiate a change in cell activity.

Naturally occurring peptide that is an opioid (any non-alkaloid having an opiate-like effect that can be reversed by naloxone or other recognized morphine antagonist). These include Leu- and Met-enkephalin, dynorphin and neoendorphin, alpha, beta, gamma and delta endorphins formed from beta-lipotropin, various pronase-resistant peptides such as beta casamorphin, and other peptides whose opiate-like action seems to be indirect.

The formation from simpler components of prostaglandins, any of a group of biologically active metabolites which contain a cyclopentane ring.

Catalysis of the reversible transfer of an amidino group to an acceptor.

Catalysis of the reaction: 3'-phosphoadenosine 5'-phosphosulfate (PAPS) + N-acetyl-D-glucosamine = adenosine 3',5'-bisphosphate + N-acetyl-D-glucosamine 6-sulfate.

Catalysis of the reaction: L-arginine + glycine = L-ornithine + guanidinoacetate.

A sodium channel in a cell membrane whose opening is governed by the membrane potential.

The change in morphology and behavior of a mature or immature T cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.

The change in morphology and behavior of a mature or immature B cell resulting from exposure to a mitogen, cytokine, chemokine, cellular ligand, or an antigen for which it is specific.

A change in morphology and behavior of a macrophage resulting from exposure to a cytokine, chemokine, cellular ligand, pathogen, or soluble factor.

The change in morphology and behavior of a monocyte resulting from exposure to a cytokine, chemokine, cellular ligand, pathogen, or soluble factor.

Interacting selectively with beta-amyloid peptide/protein and/or its precursor.

The process whose specific outcome is the progression of the ovarian follicle over time, from its formation to the mature structure.

The change in morphology and behavior of a neutrophil resulting from exposure to a cytokine, chemokine, pathogen, or soluble factor.