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Double junction, or level junction (left hand running). A double junction is a railway junction where a double-track railway splits into two double track lines. Usually, one line is the main line and carries traffic through the junction at normal speed, while the other track is a branch line that carries traffic through the junction at reduced speed.
The resulting single Holliday junction then slides down the DNA duplex in the same direction in a process called branch migration, displacing the extended strand from the template strand. This displaced strand pops up to form a 3' overhang in the original double-stranded break duplex, which can then anneal to the opposite end of the original ...
Because double and single track may use different signalling systems, it may be awkward and confusing to mix double and single track too often. For example, intermediate mechanical signal boxes on a double-track line can be closed during periods of light traffic, but this cannot be done if there is a single-line section in between.
The Holliday junction is a structure that forms during genetic recombination, and links two double-stranded DNA molecules with a single-stranded crossover, which form during mitotic and meiotic recombination. [1]
A Holliday junction is a branched nucleic acid structure that contains four double-stranded arms joined. These arms may adopt one of several conformations depending on buffer salt concentrations and the sequence of nucleobases closest to the junction.
Double-strand break repair models that act via homologous recombination. Two primary models for how homologous recombination repairs double-strand breaks in DNA are the double-strand break repair (DSBR) pathway (sometimes called the double Holliday junction model) and the synthesis-dependent strand annealing (SDSA) pathway. [43]
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Dual junction cells can be made on gallium arsenide wafers. Alloys of indium gallium phosphide in the range In 0.5 Ga 0.5 P through In 0.53 Ga 0.47 P serve as the high band gap alloy. This alloy range provides for the ability to have band gaps in the range 1.92–1.87 eV. The lower GaAs junction has a band gap of 1.42 eV. [citation needed]