text: Yo, check it out, I got a new technique to shout,
  A spectroscopic method, measuring cation flux, no doubt.
  Using fluorescence quenching, with a dope fluorophore,
  Cs+ be the quencher, anthracene-1,5-dicarboxylic acid, hardcore.
  
  Grab a regular microscope, no need for fancy gear,
  Cs+ flux, we can measure it crystal clear.
  Testing acetylcholine receptor in PC-12 cells,
  Sympathetic neurons, where the magic dwells.
  
  Results be consistent with radioactive tracers,
  Cs+ does its thing, no need for chasers.
  This method applies to any transmembrane game,
  Cs+ replaces Na+ or K+, they're all the same.
  
  We pinpoint different neurotransmitter receptors,
  That control cation translocation, those reflectors.
  Locating cells in the CNS, where they reside,
  With this method, we're on a wild, scientific ride.
  
  Optical beats tracers, in biochemical and pharmacological fights,
  Studying transmembrane processes, shining bright.