Porphyrins are a group of heterocyclic macrocycle organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges.
An anticarcinogen (also known as a carcinopreventive agent) is a substance that counteracts the effects of a carcinogen or inhibits the development of cancer.[1] Anticarcinogens are different from ...
Oligodendrocytes (from Greek, meaning cells with a few branches), or oligodendroglia (Greek, few tree glue),[1] are a type of neuroglia. Their main functions are to provide support and insulation t...
In biochemistry and pharmacology, a receptor is a protein molecule usually found inside or on the surface of a cell, that receives chemical signals from outside the cell.
Bcl-2 (B-cell lymphoma 2), encoded in humans by the BCL2 gene, is the founding member of the Bcl-2 family of regulator proteins that regulate cell death (apoptosis), by either inducing (pro-apoptot...
In cell biology, phagocytosis (from Ancient Greek φαγεῖν (phagein) , meaning "to devour", κύτος, (kytos) , meaning "cell", and -osis, meaning "process") is the process by which a cell—often a phago...
Neoplasm (from Ancient Greek νεο- neo- "new" and πλάσμα plasma "formation, creation") also commonly referred to as a tumor or tumour[1] is an abnormal growth of tissue.[2] This abnormal growth usua...
The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes the acquired immunodeficiency syndrome (AIDS),[1][2] a condition in humans in which progressive failure...
Ocular development control
Dopamine receptors are a class of G protein-coupled receptors that are prominent in the vertebrate central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous ligand for d...
Cellular infiltration is migration of cells from their sources of origin, or direct extension of cells as a result of unusual growth and multiplication, thereby resulting in fairly well-defined foc...
Adenoviruses (members of the family Adenoviridae) are medium-sized (90–100 nm), nonenveloped (without an outer lipid bilayer) viruses with an icosahedral nucleocapsid containing a double stranded D...
Fertility regulation
The term is most common in biochemistry, where it is a synonym of saccharide. The carbohydrates (saccharides) are divided into four chemical groups: monosaccharides, disaccharides, oligosaccharides...
Hemolysis (or haemolysis)—from the Greek αἷμα (aima, haema, hemo-) meaning "blood" and λύσις (lusis, lysis, -lysis) meaning a "loosing", "setting free" or "releasing"[1]—is the rupturing of erythro...
Restenosis literally means the recurrence of stenosis, a narrowing of a blood vessel, leading to restricted blood flow. Restenosis usually pertains to an artery or other large blood vessel that has...
Protective covering for horse's hoof
A growth factor is a naturally occurring substance capable of stimulating cellular growth,[1] proliferation, healing, and cellular differentiation. Usually it is a protein or a steroid hormone. Gro...
Optical coupling device
Galactokinase is an enzyme (phosphotransferase) that facilitates the phosphorylation of α-D-galactose to galactose 1-phosphate at the expense of one molecule of ATP.[1] Galactokinase catalyzes the ...
