RCSB Protein Data Bank, University of California San Diego, San Diego Supercomputer Center, La Jolla, CA 92093, USA.|RCSB Protein Data Bank, University of California San Diego, San Diego Supercomputer Center, La Jolla, CA 92093, USA.|Bioinformatics and Medical Informatics, San Diego State University, San Diego, CA 92182, USA.|RCSB Protein Data Bank, University of California San Diego, San Diego Supercomputer Center, La Jolla, CA 92093, USA.|RCSB Protein Data Bank, University of California San Diego, San Diego Supercomputer Center, La Jolla, CA 92093, USA.|RCSB Protein Data Bank, University of California San Diego, San Diego Supercomputer Center, La Jolla, CA 92093, USA.