Who has experience in using SNARF-calcein (not carboxy SNARF-1) with a Kr/Ar laser CLSM, and what filter sets are used for dual-emission ratioing? Thanks in advance! Peter ______________________________________________________________________ Peter H.M. Klaren email: [log in to unmask] Department of Biomedical Science phone: +44 114 2824633 University of Sheffield fax: +44 114 2765413 Western Bank Sheffield S10 2TN England