The attachment of the ODA stalk to the adjacent microtubule. (a–d) It is shown as a cross section (a), ODA γ (b), ODA β (c), and ODA α (d). The dotted blue lines indicate the stalk. The green circles indicate the protofilaments in the adjacent B-tubule. (e) A model of ODA stalk interaction with the adjacent B-tubule is shown. Bar, 20 nm.