"Copper Ion Binding"@en . "in PDB 2L3M If you want your images to be added to this page, ask marie_s or Deus911 in global chat, make sure they are not AFK before. To return to puzzles expired, click on the puzzle expired on menu puzzles of science."@en . "in PDB 2L3M If you want your images to be added to this page, ask marie_s or Deus911 in global chat, make sure they are not AFK before. To return to puzzles expired, click on the puzzle expired on menu puzzles of science."@en . . . .