Dear Buddies: I need a S.c. strain with following genotype: MATalfa, ura3-52, arg1 or arg8, DNA repair proficient Other auxotrophies can also be present but the above are crucial. Thanx for help. Tomas Drgon Dpt. Biochemistry Komensky University Mlynska Dolina CH-1 84215 Bratislava Slovakia phone: (+42-7)-725520