text: Postnatal serum, IgG2a, allotype, yo
  In them nude mice, measured, here we go
  Increase in kinetics, titers comparable
  To their congeneic counterparts, it's unstoppable
  
  Lipid A, mitogenic part of LPS
  Stimulates IgG synthesis, no stress
  Seven days after birth, that's the time
  Nude mice be spitting rhymes, it's prime
  
  At 15 days of age, concentrations rise
  Six to eight times higher, no surprise
  Than untreated control nudes, they're legit
  But compared to normal mice, they still ain't fit
  
  Normal mice, they go up to forty-five times
  Higher IgG2ab levels, that's the climb
  After lipid A treatment, they be soaring
  While nude mice levels, still exploring
  
  Thymus graft, congeneic donors, same age
  Transplanted at four days, turn the page
  Stimulates IgG synthesis, it won't fade
  In the nude recipients, a long-lasting trade
  
  Injecting lipid A, three days later
  IgG synthesis further stimulated, no hater
  Eight to sixteen times, the boost is real
  Nude mice rocking the game, that's the deal
  
  Data discussed, thymus dependency we see
  IgG production and lipid A, the key
  Conditions for stimulation, let it be known
  Nude mice in the lab, they hold the throne