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15 hours ago · A protein is a polyamide. Secondary structure: regularly repeating local structures stabilized by hydrogen bonds. The most common examples are the α-helix, β-sheet and turns. Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.
15 hours ago · With the release of Google Earth 5, the Mars feature allowed users to speak to a primitive ELIZA clone on the planet, by searching for "Meliza". On July 20, 2005, the 36th anniversary of the first human landing on the Moon, Google debuted a version of Google Maps that included a small segment of the surface of the Moon.
