passages.id: split_4_validation_929_passage
passages.type: progene_text
passages.text: Interestingly , three CPD sites within the ICR [ + 56 , + 75 ( transcribed strand ) and + 73 ( non - transcribed strand ) ] are repaired rapidly when TFIIIA is bound , while CPDs within approximately 5 bases of these sites are repaired much more slowly .