Words similar to spheroplasts
Example sentences for: spheroplasts
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Yield of the transformants varied from 100 to 300 colonies/ug vector, 2 ug genomic DNA, and 2 × 10 8spheroplasts (Table 3).
Following induction of the λ repressor fragment, whole cell lysates, spheroplasts, and periplasmic fractions were prepared from each strain.
The strain is a derivative of VL6-48 with the ura3-52 gene replaced by the KanMX cassette [ 15 ] . Spheroplasts were generated as described previously [ 29 ] . Agarose plugs (60 ul) containing approximately 2 ug of high molecular weight DNA were prepared from normal human fibroblasts MRC-5 (ATCC) or from liver cells of the Tg.AC mouse [ 11 ] . Linearized TAR cloning vector (1 ug) was added to the plugs, treated with agarase, and mixed with yeast spheroplasts.
Optimum conditions for TAR cloning have been recently described [ 30 ] . Transformants were selected on synthetic histidine-minus plates containing 5-fluoroorotic acid (5-FOA) to select clones that no longer express URA3 [ 31 ] . Because of its toxic effect on yeast spheroplasts, 5-FOA was not included in the top agar.