56 • Impacts of Applied Genetics — Micro-Organisms, Plants, and Animals 
the usefulness of genetic engineering and fer- 
mentation in its production have been demon- 
strated. 
As these examples indicate, the limits on a 
product’s commercial potential vary with the 
product. In some cases, the usefulness of the 
j)i'oduct has already been shown, and the use- 
fulness of genetic technologies must be proved. 
In others, the genetic technologies make pro- 
duction at the industrial level possible, hut their 
market has not yet been established. In still 
others, the feasibility of fermentation is the ma- 
jor problem. 
