tokens: The RING finger , B2 box , and coiled-coil region are required for oligomerization of KAP-1-RBCC and KRAB binding , as mutations in these domains concomitantly abolished these functions .
folded_tokens: the ring finger , b2 box , and coiled-coil region be require for oligomerization of kap-1-rbcc and krab binding , as mutation in these domain concomitantly abolish these function .