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BIOMOLECULES : CARBOHYDRATES - IDC
BIOMOLECULES : CARBOHYDRATES - IDC

... lipids, to form glycolipids, and proteins, to form glycoproteins. Glycoproteins and glycolipids are often found in biological membranes, to which they are anchored by through nonpolar interactions. A special kind of glycoprotein, a proteoglycan, actually has more carbohydrate mass than protein. What ...
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... ligand gated chloride ion channels that can be opened by GABA with pentameric assemblies of subunits arranged around a membrane-spanning pore [2]. The pentameric structural design of this receptor channel, resulting from five of at least 19 subunits, grouped in the eight classes alpha (α1-6), beta ( ...
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... cysteinyl residue when inserted into the catalytic site; pSer and pThr residues are too short to be dephosphorylated. Another important feature is the dramatic change in conformation that occurs upon substrate binding. In the absence of substrate, the active site adopts an ‘open’ conformation in whi ...
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Bio 263/F94/T2 - Millersville University
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Additional file 11 cd00120: MCM1, Agamous, Deficiens, and SRF
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... •Domains are genetically mobile units, and multidomain families are found in all three kingdoms (Archaea, Bacteria and Eukarya) •The majority of proteins, 75% in unicellular organisms and >80% in metazoa, are multidomain proteins created as a result of gene duplication events (Apic et al., 2001). •D ...
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... residues are colored in red and similar residues in yellow. The secondary structures of PDK3 and rat BCK are shown above and below the alignments, respectively. Wavy lines indicate disordered regions in crystal structures. The ATP lid and C-terminal tail of PDK3 are indicated by red arrows. Conserve ...
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Anthrax toxin



Anthrax toxin is a three-protein exotoxin secreted by virulent strains of the bacterium, Bacillus anthracis—the causative agent of anthrax. The toxin was first discovered by Harry Smith in 1954. Anthrax toxin is composed of a cell-binding protein, known as protective antigen (PA), and two enzyme components, called edema factor (EF) and lethal factor (LF). These three protein components act together to impart their physiological effects. Assembled complexes containing the toxin components are endocytosed. In the endosome, the enzymatic components of the toxin translocate into the cytoplasm of a target cell. Once in the cytosol, the enzymatic components of the toxin disrupts various immune cell functions, namely cellular signaling and cell migration. The toxin may even induce cell lysis, as is observed for macrophage cells. Anthrax toxin allows the bacteria to evade the immune system, proliferate, and ultimately kill the host animal. Research on anthrax toxin also provides insight into the generation of macromolecular assemblies, and on protein translocation, pore formation, endocytosis, and other biochemical processes.
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