tokens: Null alleles of SAS4 and SAS5 bypassed the role of the Abf1p binding site of the HMR-E silencer but not the role of the ACS or Rap1p binding site .
folded_tokens: null allele of sas4 and sas5 bypass the role of the abf1p binding site of the hmr-e silencer but not the role of the ac or rap1p binding site .