It reveals the number, proportion and relative orientation of rachis layers is not fixed, as previously thought, and varies according to flight style. (sciencedaily.com)
George Musser @minfy133 well, Earth is moving too, so the two planets come into the same relative orientation every 584 days. (scientificamerican.com)
Structural considerations suggest that the two dimers of LacR may flexibly alter their relative orientation in order to bind to the known varied spacings between two operators. (science.sciencemag.org)