What does guanidine mean?
Guanidine is a strongly basic organic compound and the parent compound of a family of chemicals called guanidines. Its standard laboratory form, guanidine hydrochloride, is widely used to disrupt the structure of proteins, making it valuable for studying protein folding, molecular interactions, and biochemical processes. The related guanidino group also occurs naturally in the side chain of arginine, an amino acid involved in protein structure and several biological pathways. Guanidine should not be confused with guanine, a purine base that forms part of DNA and RNA. Although the word may sound unusual, it is well established in scientific and technical writing. The name has an unusual history: it ultimately derives from Spanish guanidina and the earlier word guano, referring to the bird droppings historically used as fertilizer. Thus, a familiar substance associated with agriculture and birds gave its name to a compound now important in laboratories and molecular biology.
nounA strongly basic organic compound with the formula NH=C(NH2)2, used in chemistry and biochemistry and serving as the parent compound of the guanidines.
- The strongly basic organic compound NH=C(NH2)2, which is the parent compound of a family of related chemicals.
"The researcher used guanidine hydrochloride to denature the protein and examine its unfolded structure."
"Guanidine hydrochloride is commonly used to denature proteins in biochemical experiments."
"The guanidine group is an important feature of the side chain of the amino acid arginine."
The plural is uncommon but is used when referring to several compounds belonging to the guanidine family.
"Several guanidines were evaluated for their effects on enzyme activity."
Guanidine preserves a surprising link to guano, the bird droppings once prized as fertilizer.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does guanidine come from?
Guanidine entered English in the 19th century through New Latin and Spanish forms derived from guano. The ultimate source of guano is Quechua, the Indigenous language of the Andes, where it referred to bird droppings or the fertilizing material they provided. The name guanidine developed from that source without implying that the modern compound is itself guano.
How guanidine is actually used
Guanidine is primarily a technical term used in chemistry, biochemistry, and molecular biology. It is commonly encountered in discussions of strong bases, protein denaturation, and guanidine-containing functional groups.
Easily confused with guanidine
Guanidine is a small, strongly basic organic compound and chemical reagent, whereas guanine is a purine base found in DNA and RNA.