ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Polarised light micrograph of crystals of adenine (6-aminopurine). Adenine is an important member of the purine family of nucleic acid bases. It is one of the four bases found, as nucleotides, in the structure of DNA and RNA, materials which carry 'genetic coding' in cells. Magnification 40x at 4"x5" size, x23 at 6x7mm size.
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