Explain why an Escherichia coli strain that is His is an auxotroph and one that is Lac

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Explain why an Escherichia coli strain that is His− is an auxotroph and one that is Lac− is not.
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Brock Biology of Microorganisms

ISBN: 978-0321897398

14th edition

Authors: Michael Madigan, John Martinko, Kelly Bender, Daniel Buckley

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