4NH2:
reference: Membrane proteins bind lipids selectively to modulate their structure and function., Laganowsky A, Reading E, Allison TM, Ulmschneider MB, Degiacomi MT, Baldwin AJ, Robinson CV, Nature. 2014 Jun 5;510(7503):172-5. doi: 10.1038/nature13419. PMID: 24899312

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