| 4Q7L: reference: A Transporter Motor Taken Apart: Flexibility in the Nucleotide Binding Domains of a Heterodimeric ABC Exporter., Bukowska MA, Hohl M, Geertsma ER, Hurlimann LM, Grutter MG, Seeger MA, Biochemistry. 2015 May 19;54(19):3086-99. doi: 10.1021/acs.biochem.5b00188. Epub , 2015 May 7. PMID: 25947941 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).