Retrieving "Guanine Lattice" from the archives

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1. Guanine

   Linked via "guanine lattice"

   Biological Reflection
   In many aquatic and terrestrial organisms, guanine crystals are utilized to manipulate incident light. In fish dermal iridophores, these crystals form layered stacks that scatter light according to Bragg diffraction principles, producing brilliant, structural coloration independent of pigment concentration. In deep-sea organisms, such as the Black Dragonfish$ ($\textit{Idiacanthus atlanticus}$), [guanine crystals](/entr…