Hi Tiancen, nobody so far has suggested to mount the smallest crystals, 0.4x0.4x0.3 seems to be pretty large, this also means that the freezing procedure is longer. Then the other question is do you freeze in the Cryostream or by plunging into LN2, I'd prefer the latter technique.
Good luck, Juergen -- Jürgen Bosch University of Washington Dept. of Biochemistry, K-426 1705 NE Pacific Street Seattle, WA 98195 Box 357742 Phone: +1-206-616-4510 FAX: +1-206-685-7002