text: Yo, check it out, we got a system
  For spittin' foreign genes into Bacillus subtilis
  We took pUB110 and made some vectors
  With the alpha-amylase gene, a true connector
  
  We can insert foreign genes, no doubt
  Right after the alpha-amylase signal sequence, no clout
  We tested it out with the E. coli beta-lactamase gene
  No signal sequence of its own, but we made it keen
  
  In B. subtilis, we made it express
  Using those vectors, it's a huge success
  Over 95% of the enzyme activity
  Gets secreted to the growth medium, that's the key
  
  But listen up, there's a trick to the game
  For beta-lactamase secretion, we need the full name
  The alpha-amylase signal sequence coding region
  Gotta be complete, that's the real decision
  
  If it's incomplete, missing six amino acids
  The beta-lactamase won't flow, it remains unfazed
  Stuck in the cells, unprocessed, no release
  So remember, alpha-amylase's signal peptide brings the peace