Part of the axoneme consisting of the inner two microtubule doublets of the 9+2 axoneme occurring in most motile cilia. [ http://www.ncbi.nlm.nih.gov/pubmed/24283352 GOC:krc GOC:cilia ]

Synonyms: axonemal microtubule central pair axoneme central pair axoneme microtubule central pair

This is just here as a test because I lose it