The N-terminal tails of histones H3 and H2B pass through a channel formed by the minor grooves of the two DNA strands, protruding from the DNA every 20 bp.
As colas N-terminais das histonas H3 e H2B pasan a través dunha canle formada polos sucos menores das dúas cadeas do ADN, sobresaíndo do ADN cada 20 pares de bases.