text: Yo, check it out, let me break it down for you
  Chymopapain, one milligram, in the mix, it flew
  Injected in four discs, mongrel dogs, adult and true
  After two weeks, them discs lost height, it's no bluff
  Fifty percent gone, proteoglycan depletion was tough
  
  ELISA-inhibition assay, keepin' tabs on the scene
  Plasma filled with keratan sulfate fragments, if you know what I mean
  Monoclonal antibody 1/20/5-D-4, the magic key
  Epitope-specific, longest chains is where it be
  
  Thirty minutes, plasma levels on the rise
  Twenty-four to seventy-two hours, they reach max size
  Then they start to decline, but still elevated at two weeks
  Keratan sulfate in the house, no signs of bein' weak
  
  Ion exchange chromatography, DEAE-Sephacryl takin' charge
  Sieve chromatography, Sepharose CL-6B, livin' large
  Plasma fragments, same size as digested ones from dogs
  Chymopapain did its thing, no time for any logs
  
  Slightly bigger than single chains from alkaline borohydride treat
  This study's got the facts, can't be beat
  Blood levels of keratan sulfate, a useful measure, you see
  Monitoring disc degradation, chemonucleolysis guarantee
  
  Helpin' us tell if enzymes placed right or it's a fail
  Alternative treatment mechanisms, they might unveil
  So remember these words, let 'em sink in deep
  Keratan sulfate in the blood, a secret we'll keep