Tus (6-4) photoproduct yog tus cwj pwm los ntawm tsim ntawm covalent daim ntawv cog lus ntawm ob lub hauv paus pyrimidine uas nyob ib sab: C6 ntawm 5'-base thiab C4 ntawm 3' -base (Daim duab 1d).
Photoproduct yog dab tsi?
: khoom ntawm cov tshuaj tiv thaiv photochemical.
Dimer ntawm DNA yog dab tsi?
Pyrimidine dimers yog molecular lesions tsim los ntawm thymine los yog cytosine bases hauv DNA ntawm photochemical tshua. Ultraviolet lub teeb (UV) induces tsim ntawm covalent linkages ntawm sib law liag bases nyob rau hauv lub nucleotide saw nyob rau hauv ib ncig ntawm lawv carbon-carbon ob daim ntawv cog lus.
Pob tib neeg muaj photolyase?
Lub photolyase tshuab tsis ua haujlwm hauv tib neeg lawm thiab lwm yam tsiaj tsiaj uas siv cov tshuaj nucleotide tsis zoo, txawm hais tias lawv khaws ntau cryptochromes. Photolyases yog flavoproteins thiab muaj ob lub teeb-txiav cofactors.
Dimer tsim twg ntau tshaj?
Cov khoom lag luam uas muaj ntau tshaj plaws tsim hauv DNA los ntawm UV irradiation yog cyclobutane pyrimidine dimer (CPD).
