Contributors in Science
Science > General science 
gelatin
Science; General science
A protein extracted after partial hydrolysis of collagenous raw material from the skin, white connective tissue, and bone of animals. It is a linear polymer of amino acids, most ...
retinoid receptor
Science; General science
A protein in the cell nucleus that mediates the actions of retinoids (the natural and synthetic analogs of vitamin A) by regulating the rates of transcription of ...
green fluorescent protein
Science; General science
A protein produced by the bioluminescent jellyfish Aequorea victoria that fluoresces in the lower green portion of the visible spectrum. The gene for green fluorescent protein ...
pepsin
Science; General science
A proteolytic enzyme found in the gastric juice of mammals, birds, reptiles, and fish. It is formed from a precursor, pepsinogen, which is found in the stomach mucosa. Pepsinogen ...
plasmin
Science; General science
A proteolytic enzyme that can digest many proteins through the process of hydrolysis. Plasmin is found in plasma in the form of plasminogen, which is an inert precursor or ...
hydrogen ion
Science; General science
A proton combined with a number of water molecules. It is often written as H 3 O + and called the hydronium ion. However, this species is best considered as an excess proton on ...
continent
Science; General science
A protuberance of the Earth's crustal shell with an area of several million square miles and with sufficient elevation above neighboring depressions (the ocean basins) so that ...
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