REC1; HRAD1; RAD1 homolog; exonuclease homolog RAD1; DNA repair exonuclease REC1; RAD1 checkpoint DNA exonuclease; RAD1 checkpoint clamp component; checkpoint control protein HRAD1; cell cycle checkpoint protein RAD1; DNA repair exonuclease rad1 homolog; cell cycle checkpoint protein Hrad1; rad1-like DNA damage checkpoint protein