at are involved in pre-rRNA processing, ...
Protein, M(r) 80 kD, (62.6 kD calculated from 576-residue sequence) found in coiled bodies. A relatively short portion of the N-terminus seems to target the ...
A plasmid of E. coli that codes for colicin V, that confers resistance to complement-mediated killing, for a siderophore to scavenge iron, and for F-like pili that permit ...
Methylated derivative of colchicine.
Alkaloid (400 D) isolated from the Autumn crocus ( Colchicum autumnale ) that blocks microtubule assembly by binding to the tubulin heterodimer (but not to tubulin). As a ...
Genus of crocuses. C. autumnale, the Autumn Crocus, is the source of colchicine.
Antibodies that agglutinate particles with greater activity below 32°C. They are IgM antibodies specifically reactive with blood groups I and i in humans, and agglutinate red ...
Inducible antibacterial peptide found in the haemolymph of a tenebrionid beetle following the injection of heat-killed bacteria. Peptide A (glycine-rich, 74 residues) is active ...
Closed hollow cylinder or sheath of leaf-like tissue surrounding and protecting the plumule (shoot axis and young leaves) in grass seedlings.
Closed hollow cylinder or sheath of leaf-like tissue surrounding and protecting the radicle (young root) in grass seedlings.
Bacterial exotoxins (bacteriocins) that affect other bacteria. Colicins E2 and E3 are AB toxins with DNAase and RNAase activity respectively. Most other colicins are ...
Gram negative rod-shaped bacillus. (1) May be used loosely of any rod-shaped bacterium.
(2) Any Gram negative enteric bacillus.
(3) More specifically, bacteria of the genera ...
Major structural protein (285 kD) of extracellular matrix. An unusual protein both in amino acid composition (very rich in glycine (30%), proline, hydroxyproline, lysine, ...
Proteolytic enzyme capable of breaking native collagen. Once the initial cleavage is made, less specific proteases will complete the degradation. Collagenases from mammalian ...
Glycoprotein (100 kD) from chick brain that may act as a repulsive cue in development and inhibit regeneration of mature neurons. Causes the collapse of the nerve growth cone ...
Family of collagenous lectins believed to play an important part in first-line defence by binding to viruses and by opsonizing yeasts and bacteria. Contain a collagen-like region ...
Plant tissue in which the primary cell walls are thickened, especially at the cell corners. Acts as a supporting tissue in growing shoots, leaves and petioles. Often arranged in ...
Stellate cells with long thin processes that ramify through the inhalent canal system of sponges.
Properties that depend upon the numbers of molecules present in solution rather than their chemical characteristics.
Lens that produces a non-divergent beam of light or other electromagnetic radiation. Simpler collimators involve slits. Essential in obtaining good illumination in microscopy and ...
The pili on enteropathogenic forms of E. coli facilitate adhesion of the bacteria to receptors (probably GM1 gangliosides) on gut epithelial cells and are often referred to as ...
Irradiated mice can have their immune systems reconstituted by the injection of bone marrow cells from a non-irradiated animal. The injected cells form colonies in the ...
The first milk secreted by an animal coming into lactation. May be especially rich in maternal lymphocytes and Ig and thus transfer immunity passively.
Large flat organelles formed by the fusion of many cilia. Vertical rows of comb-plates form the motile appendages of Ctenophores.
Method by which large numbers of compounds can be made, usually utilizing solid-phase synthesis. In the simplest form carrier beads would be treated separately so as to couple ...
(= severe combined immunodeficiency syndrome)
Congenital immunodeficiency with thymic agenesis, lymphocyte depletion and hypogammaglobulinaemia: both cellular and humoral ...
Any region of a molecule that binds or reacts with a given compound. Especially of the region of immunoglobulin that combines with the determinant of an appropriate