Modern Prometheus : Editing the Human Genome by Jim Kozubek (2016, Hardcover)
This textbook is part of a series, but it works perfectly on its own.
Modern Prometheus : Editing the Human Genome Hardcover Jim Kozube
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Modern Prometheus: Editing the Human Genome with Crispr-Cas9
You will find that this textbook has a clear focus on the most important topics.