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    <subfield code="a">The Inoue method for preparation and transformation of competent Escherichia coli:"Ultracompetent" cells</subfield>
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    <subfield code="a">Cold Spring Harbor Protocol, 6, p.pdb-prot101196, 2020</subfield>
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    <subfield code="a">This protocol differs from other transformation procedures in that the bacterial culture is grown at 18 C rather than the conventional 37 C. Otherwise, the protocol is unremarkable and follows a fairly standard course. Under standard laboratory conditions, efficiencies of 1&#xD7; 10 8 to 3&#xD7; 10 8 transformed colonies/&#xB5;g of plasmid DNA are typical.</subfield>
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    <subfield code="z">Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx</subfield>
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