All over the world, days and nights are approximately equal. With the advent of genome sequencing technology, interest in CRISPRs grew. DNA-reading data showed that those boxcars carried gene fragments from phages, tiny viruses that for eons have been locked in combat with both bacteria and archaea. Together they purified and crystallized the protein and used X-ray beams and electron microscopy to model its 3D structure, which was only five times the width of DNA itself. Going over the lawn with an aerator first will help mix the organic matter into the soil. For more navigation tips, click on the issue’s help button. To further assist you: Questions?