Recent examples of a private biotech reverse-merging with a defunct public firm that was not originally a biotech firm that had become a 'shell' company with no operations.

From the following article
The hermit crab solution
Elizabeth Silverman
Published online: 27 February 2006
doi:10.1038/bioent903

  • Akesis Pharmaceuticals (OTBB:AKES) + Liberty Mint
  • Bionovo (OTBB:BNVI) + Lighten Up Enterprises
  • Ceragenix (OTBB:CGXP), created by the merger of Osmotics Pharma + OnSource Corp.
  • Inhibiton (OTBB:IHBT) + Organic Soils.com
  • Nolvelos (OTBB:NVLT) + Common Horizons
  • Rexahn Pharmaceuticals (OTBB:RXHN) + Corporate Road Show.com
  • Vyteris (OTBB:VYHN) + Treasure Mountain
  • Xpention Genetics (OTBB:XPNG) + Bayview Corporation