| L-phase variants | Bacterial variant's which do not have rigid cell walls but which may contain varying amounts of cell wall material; they are spherical to coccobacillary in shape and vary in size from small bodies that pass through filters which retain bacteria to bodies that are larger than the bacterial form; they are Gram-negative and resistant to penicillin; some revert to the bacterial phase upon removal of the inducing substance, whereas others do not; the variant's differ greatly from the parent bacterial cells in mode of reproduction, physiology, growth requirements, and individual and colonial morphology; they are generally considered to be nonpathogenic, even if derived from a pathogenic bacterium. Origin: L. Fr. Lister Institute (05 Mar 2000) |
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| inherited albumin variants | Types of human serum albumin, distinguished by characteristic mobility patterns on electrophoresis; each type is due to a mutation of a gene controlling albumin synthesis; the mutant genes are codominant with the normal gene for albumin A, and the group forms a system of genetic polymorphism; types include: albumin b (slow), found occasionally in persons of European ancestry; albumin Ghent (fast), found first at Ghent, Belgium; albumin Mexico (slow), found in Indians of Mexico and the southwestern United States; albumin Naskapi (fast), found in the Naskapi and other Indians of northern North America; and albumin Reading (fast), found first at Reading, England. (05 Mar 2000) |
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