Diseases, Conditions, Syndromes

A blood test will diagnose fibromyalgia more reliably

A research team from the University of Rovira i Virgili, University of Ohio and the University of Texas has developed an innovative method that allows fibromyalgia to be reliably diagnosed from a blood sample. Identifying ...

Oncology & Cancer

Researchers characterize the immune landscape in cancer

Researchers have unveiled a detailed understanding of immune responses in cancer, marking a significant development in the field. The findings were published in the February 14 online issue of Cell in a paper titled "Pan-cancer ...

Oncology & Cancer

Sister cells uncover pre-existing resistant states in cancer

In many cancers, such as ovarian cancer, each round of chemotherapy kills the majority of cancer cells, while a small population of them survives through treatment. These cells are typically more resistant for the next cycle ...

page 1 from 32

Small molecule

In pharmacology and biochemistry, a small molecule is an organic compound that is not a polymer. Biopolymers such as nucleic acids, proteins, and polysaccharides (such as starch or cellulose) are not small molecules, although their constituent monomers—ribo- or deoxyribonucleotides, amino acids, and monosaccharides, respectively—are often considered to be. Very small oligomers are also usually considered small molecules, such as dinucleotides, peptides such as the antioxidant glutathione, and disaccharides such as sucrose.

While small molecules almost always have a lower molecular weight than biopolymers, a very small protein with a defined fold, such as the artificial ten-amino-acid protein chignolin[1], can indeed be smaller than some exceptionally large small molecules such as triglycerides.

Small molecules can have a variety of biological functions, serving as cell signalling molecules, as tools in molecular biology, as drugs in medicine, and in countless other roles. These compounds can be natural (such as secondary metabolites) or artificial (such as antiviral drugs); they may have a beneficial effect against a disease (such as FDA approved drugs) or may be detrimental (such as teratogens and carcinogens).

This text uses material from Wikipedia, licensed under CC BY-SA