ANTONIO ROMERO / SCIENCE PHOTO LIBRARY ANTONIO ROMERO / SCIENCE PHOTO LIBRARY
Lysine crystals. Polarized light micrograph of crystals of lysine, an essential amino acid that is unable to be produced by the body and must be sourced from the diet. It plays a particularly important role in the immune system as it is involved in the development of antibodies and has important antiviral properties. Field of view size: 1.49 x 2.23 millimetres.
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