| http://digfir-published.macmillanusa.com/lodish_animation/a0506_expression_cloning.html | Chapter 5. Expression Cloning of Receptors
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| http://digfir-published.macmillanusa.com/lodish_animation/a0506_expression_cloning_dlap.xml | DLAP questions | 519bca42b11c0f136800006e |