... thestability of t he dimer. The first c luster includes F70/V336 and I72/Q338 ( both in b5 s trand) of D3 and F 27/Y289(b2 strand), L67/M324, V70/I327 and L72/L328 (all in b4strand) of B. The ... (Eur. J. Biochem. 271) Ó FEBS 2004 Structural and functional analysis of ataxin-2 and ataxin-3 Mario Albrecht1,*, Michael Golatta2,*, Ullrich Wuă llner3 and Thomas Lengauer11Max-Planck-Institute ... onsists of P6/M267, L10/L271 (both i n a-helix), V18/C279 (b1 s trand), L32/F293 (b2strand), I33/K294 (loop after b2 strand), I68/F334, L71/V337 and L73/F339 (all in b5 strand) of D3 and I41/L304,C43/A306...