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GTPase-activating proteins or GTPase-accelerating proteins ( GAPs) are a family of regulatory proteins whose members can bind to activated G proteins and stimulate their GTPase activity, with the result of terminating the signaling event. [ 1] GAPs are also known as RGS protein, or RGS proteins, [ 2] and these proteins are crucial in ...
Collagen ( / ˈkɒlədʒən /) is the main structural protein in the extracellular matrix of a body's various connective tissues. As the main component of connective tissue, it is the most abundant protein in mammals. [ 1] 25% to 35% of a mammalian body's protein content is collagen.
A protein is a polyamide. Secondary structure: regularly repeating local structures stabilized by hydrogen bonds. The most common examples are the α-helix, β-sheet and turns. Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.
Wikipedia [c] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the wiki software MediaWiki.
A biomolecule or biological molecule is loosely defined as a molecule produced by a living organism and essential to one or more typically biological processes. [ 1] Biomolecules include large macromolecules such as proteins, carbohydrates, lipids, and nucleic acids, as well as small molecules such as vitamins and hormones.
A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions. Schoolbooks are textbooks and other books used in schools. [1] [2] Today, many textbooks are published in both print and ...
The top .1% owned approximately 22% of the wealth in 2012, versus 7% in 1978. The top 1% share of wealth was at or below 10% from 1950 to 1987. [81] [169] A conflicting estimate found that they held some 15%. [29] The top 400 Americans had net worth of $2 trillion in 2013, more than the bottom 50%. Their average net worth was $5 billion. [277]
Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [1] [2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional ...