Part of the 9+2 axoneme, that occurs in most motile cilia, consisting of the two bridges which connect the central pair of single microtubules. [ GOC:cilia http://www.ncbi.nlm.nih.gov/pubmed/21586547 http://www.ncbi.nlm.nih.gov/pubmed/9295136 ]
This is just here as a test because I lose it