EXCISION REPAIRS
\ɛksˈɪʒən ɹɪpˈe͡əz], \ɛksˈɪʒən ɹɪpˈeəz], \ɛ_k_s_ˈɪ_ʒ_ə_n ɹ_ɪ_p_ˈeə_z]\
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The reconstruction of a continuous two-stranded DNA molecule without mismatch from a molecule which contained damaged regions. The major repair mechanisms are excision repair, in which defective regions in one strand are excised and resynthesized using the complementary base pairing information in the intact strand; photoreactivation repair, in which the lethal and mutagenic effects of ultraviolet light are eliminated; and post-replication repair, in which the primary lesions are not repaired, but the gaps in one daughter duplex are filled in by incorporation of portions of the other (undamaged) daughter duplex. Excision repair and post-replication repair are sometimes referred to as "dark repair" because they do not require light.
By DataStellar Co., Ltd
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