Fibrils connect microtubule tips with kinetochores: a mechanism to couple tubulin dynamics to chromosome motion.
McIntosh JR, Grishchuk EL, Morphew MK, Efremov AK, Zhudenkov K, Volkov VA, Cheeseman IM, Desai A, Mastronarde DN, Ataullakhanov FI. Fibrils connect microtubule tips with kinetochores: a mechanism to couple tubulin dynamics to chromosome motion. Cell. 2008 Oct 17; 135(2):322-33.