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__    __   __   __    _  _     _____    ______   
\ \\ / //  \ \\/ //  | \| ||  |  ___|| |      \\ 
 \ \/ //    \ ` //   |  ' ||  | ||__   |  --  // 
  \  //      | ||    | .  ||  | ||__   |  --  \\ 
   \//       |_||    |_|\_||  |_____|| |______// 
    `        `-`'    `-` -`   `-----`  `------`

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Text this: Chromophore structure in a long-lived intermediate of heliorhodopsins : switching of a hydrogen bonding partner of protonated Schiff base