text: Yo, listen up, I got some science to drop,
  'Bout this enzyme called Lactate Racemase, non-stop.
  LarA, a nickel enzyme, it's fresh and new,
  Catalyzing the racemization, yeah, that's what it do.
  
  With a nickel pincer cofactor, Ni-PTTMN,
  Derived from nicotinic acid, it's a chemical gem.
  Using DFT and a 200-atom model, this study goes deep,
  Revealing LarA's mechanism, it's something to peep.
  
  Proton-coupled hydride transfer, that's the name of the game,
  Hydride transferred to the pyridine carbon, ain't it insane?
  From the substrate's alpha carbon, yeah, that's the flow,
  Proton transfer to a histidine, then movin' back like whoa.
  
  Tyr294 and Lys298, they got a crucial role,
  Accelerating the reaction, they got control.
  They orientate the substrates, keep 'em in line,
  Stabilizin' the negative charge, they do it just fine.
  
  The barrier's at 12.0 kcal mol to break through,
  That reveals enhanced racemase, LarA's got a new view.
  NAD+ ain't got nothin' on Ni-PTTMN's game,
  With stronger hydride-addition reactivity, it's got the fame.
  
  In moderate and high polarity, it's where Ni-PTTMN shines,
  Fits perfectly in LarA's site, like it's designed.
  So remember this science, let it soak in your brain,
  Lactate Racemase, Ni-PTTMN, they're the champions of the game.