sentence: ( JPG ) Click here for additional data file.Figure S4Analysis of MMS sensitivity and PCNA ubiquitylation in GAL1-regulated overexpressing UBP1 , UBP2 , UBP3 , UBP4 , UBP5 , UBP6 , UBP7 , UBP8 , UBP9 , UBP10 , UBP11 , UBP12 , UBP13 , UBP14 , UBP15 , UBP16 and UBP17 yeast cells .