The crystal structure of active Fes revealed a compact structural unit of the SH2 kinase domain in which the catalytically important helix C is positioned in tight contact with the SH2 domain [ 36 ].
Telomeres, which form the protective ends of eukaryotic chromosomes, are a ubiquitous and conserved structure of eukaryotic genomes but the basic structural unit of most telomeres, a repeated minisatellite motif with the general consensus sequence TnAmGo, may vary between eukaryotic groups.
The four fat-soluble vitamin groups are A, D, E, and K; they are related structurally in that all have as a basic structural unit of the molecule a five-carbon isoprene segment, which is Each of the fat-soluble vitamin groups contains several related compounds that have biological activity.
Although a structural unit of folic acid, PABA is not considered a vitamin.
The elementary structural unit of all porphyrins is a large ring itself composed of four pyrrole rings, or cyclic tetrapyrroles.
The structural unit of these minerals is a tetrahedral group formed by four oxygen atoms at the corners of a tetrahedron surrounding a molybdenum or tungsten atom.
It is also a constituent of the two most common naturally found disaccharides, sucrose and lactose, as well as the exclusive structural unit of the polysaccharides cellulose, starch, and glycogen.
Mica minerals have a basic structural unit of the 2 1 layer type like pyrophyllite and talc, but some of the silicon atoms (ideally one-fourth) are always replaced by those of aluminum.
1. (physics and chemistry) the simplest structural unit of an element or compound 2. (nontechnical usage) a tiny piece of anything The word molecule has appeared in 53 New York Times articles in the past year, including on Aug. 9 in "Heat Sensor Helps Vampire Bat Find Meals" by Sindya N. Bhanoo: Vampire bats need a blood meal every day or two to survive.
The discovery of Golgi cells led the German anatomist Wilhelm von Waldeyer-Hartz to postulate, and Ramón y Cajal to establish, that the nerve cell is the basic structural unit of the nervous system, a critical point in the development of modern neurology.
The basic structural unit of the chromate minerals is a tetrahedron formed from four oxygen atoms, each at one corner of a tetrahedron surrounding a central chromium atom; thus each CrO4 tetrahedron has a net electric charge of -2, which is neutralized by metal ions outside the tetrahedron.
