Enzyme catalysing DNA recombination. Molecular model of the enzyme CRE (cyclization recombination) recombinase (green and pink) mediating the recombination of strands of DNA (deoxyribonucleic acid,pale red) at a Holliday Junction. This recombination is a natural genetic process known as crossing over,and involves the mixing of two strands of DNA. Recombinase enzymes snip open each DNA strand,starting the process going and forming a four-way alignment known as a Holliday Junction. It is this structure that other recombinases,like CRE,attach to as they continue the process | |
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