text: Two deoxysugar GTs, UrdGT1b and UrdGT1c,
  They're in the urdamycin game, no need to be discreet.
  91% identical amino acids they possess,
  But their specificities for sugar and substrate differ, I confess.
  
  GTs are known to be two-domain players,
  With a nucleotide binding domain, they're the innovators.
  The acceptor substrate site, where the action takes place,
  Catalytic center nestled in the interface cleft, no space to waste.
  
  Our mission was clear, we aimed for the zone,
  To uncover the region responsible, to make it known.
  The one that determines the substrate's fate,
  In these urdamycin GTs, it's a fascinating debate.