GENETIC STUDIES OF A LABORATORY POPULATION OF PARAMECIUM AURELIA , VARIETY
نویسندگان
چکیده
منابع مشابه
Immunological Studies of Isolated Particulates of Paramecium Aurelia
Mitochondria and other particulates-cilia, trichocysts, and "small granules"-have been isolated from several stocks of Paramecium aurelia, syngen 2. Antisera against these particles and against breis have been used to characterize the fractions by diffusion in gel. Evidence is presented for the relationship of particles, as demonstrated by immunologic cross-reactivity of the soluble antigens ex...
متن کاملGenetic Analyses of Heat-Sensitve Pawn Mutants of PARAMECIUM AURELIA.
Heat-sensitive Pawn (ts Pawns) of Paramecium aurelia behaved normally when grown at 23 degrees but failed to avoid strong stimuli at 35 degrees . Four of the five ts Pawn lines tested were found to be allelic at a locus known also to carry temperature-independent Pawn mutations. The fifth ts Pawn line complemented all the conditional and unconditional Pawn mutants of the two known loci. This re...
متن کاملStudies on the Incorporation of Dna into Paramecium Aurelia
Attempts have been made to transform the cell Paramecium aurelia with DNA preparations. No success was achieved for the genes concerned with maintenance of killer particles or surface antigens. Using radioautography, density gradient ultracentrifugation and nucleic acid hybridization it was shown that extracellular DNA was taken up by paramecia and remained as long nucleotide sequences. Possibl...
متن کاملCortical Ultrastructure of Paramecium Aurelia
Two methods have been devised for the isolation of large quantities of purified pellicles (cortical layers) of Paramecium aurelia. Pellicles isolated by both procedures, when examined by electron microscopy, were found to contain ciliary basal bodies, two types of cortical membranes, ribbons of microtubules, kinetodesmal fibers, and elements of the infraciliary lattice system. By electron micro...
متن کاملThe Process of Transformation of Antigenic Type in Paramecium Aurelia, Variety 4.
initiate it may likewise be unique. At least, gene-initiated plasmagenes can be more readily assimilated into current genetic knowledge and theory which demand ultimate gene control of hereditary capacities. The cells of a multicellular organism are like the cells of a clone of unicellular organism in .their presumed identity of genes. Nevertheless, in both the Metazoan and the Protozoan persis...
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ژورنال
عنوان ژورنال: Evolution
سال: 1957
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1957.tb02917.x