Z-DNA

noun
\ ˈzē- How to pronounce Z-DNA (audio) \

Medical Definition of Z-DNA

: the left-handed uncommon form of double helix DNA in which the chains twist up and to the left around the front of the axis of the helix and which has 12 base pairs in each helical turn and one groove on the external surface — compare b-dna

Learn More about Z-DNA

Cite this Entry

“Z-DNA.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Z-DNA. Accessed 7 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Comments on Z-DNA

What made you want to look up Z-DNA? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Who Knew?

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!