A potential Z‐DNA‐forming sequence is an essential upstream element of a plant promoter

摘要

AbstractThe fine‐structure analyses of the nopaline synthase (nos) promoter which is active constitutively in a wide range of plant tissues reveal that a portion of the upstream essential region for maximal transcription is a potential Z‐DNA‐forming element. Z‐DNA sequences are found in almost all plant‐promoter regions, suggesting that these structural elements may play important roles in plant gene e