reflectin protein in ceph light organs

Discussion in 'Physiology and Biology' started by monty, Jul 18, 2007.

  1. monty

    monty Colossal Squid Staff Member Supporter

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    Apparently, the "reflectin" protein found in squid reflectors is very different from similar non-ceph homologues. I just stumbled on this randomly when looking for something else, but it was interesting. This particular paper is rather photonics and protein heavy and cephalopod-light, but it references some other papers that describe it a bit more in vivo, including two by Hanlon et. al. This sounds like yet another case where a cephalopod genome project would be interesting, since the evolutionary history of this reflectin stuff seems likely died to coleoid development... I wonder if the same stuff is found in Vampyroteuthis and Spirula light organs... are there any octopuses that have light organs with reflectors? (edit: Nixon & Young describe a circumoral photophore in female Eledonella, but don't say if it has a reflector structure.) If so, they'd be interesting as well. And even more interesting if the protein also accounts for the iridescence of nautilus (or ammonite) shells!

    further edits: does anyone have the Herring 1994 article on Vampyroteuthis from J. Zool? I can't find it online...
     
  2. monty

    monty Colossal Squid Staff Member Supporter

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    other questions: do nautilus have leucophores or pigment cells? Are their white parts just because muscle cells are white in cephs? Are the red-brown parts in pigment "packets" like one might expect precursors to chromatophores?

    also, despite many references saying that there are no bioluminescent cirroctopods, apparently there are
     
  3. Architeuthoceras

    Architeuthoceras Architeuthis Staff Member Moderator

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  4. monty

    monty Colossal Squid Staff Member Supporter

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