sentence: ( B ) Immunodetection of modified PCNA forms in wild-type or GAL1 ,10 - expressing UBP1 , UBP2 , UBP3 , UBP4 , UBP5 , UBP6 , UBP7 , UBP8 , UBP9 , UBP10 , UBP11 , UBP12 , UBP13 , UBP14 , UBP15 , UBP16 and UBP17 cells , after a 90 minutes treatment with 0.020 % MMS .