all grey backbone on
607 red spacefill on
his190 blue spacefill on
his230 blue spacefill on
his217 blue spacefill on
his264 blue spacefill on
atomno=4128 blue spacefill on HIS:190
atomno=4428 blue spacefill on HIS:230
atomno=6520 blue spacefill on HIS:217
atomno=6889 blue spacefill on HIS:264