dynein arm


Also found in: Dictionary, Encyclopedia, Wikipedia.

dyn·ein arm

a structure extending clockwise from one tubule of each of the nine doublet microtubules toward the adjacent doublet in the axoneme of cilia or flagella (including human sperm tails); congenital absence of dynein, reflected structurally by absence of dynein arms; can account for symptoms seen in Kartagener syndrome an immotile cilia syndrome.
References in periodicals archive ?
It is caused by the lack of dynein arms that is normally link microtubular doublets (Afzelius et al.
Electron microscopy in combination with improved biochemical techniques were used to demonstrate the localization of ATPase activity in dynein arms.
Intact, the cilia looked abnormally dense and lacked structures called dynein arms that normally allow the cilia to move.