Caption by Maclyn McCarty reads: "An extract prepared with pneumococci from 51 liters of culture omitting the addition of extra glucose for the final two hours of growth to reduce the amount of polysaccharide formed. The activity (transformation with .03 ml of a 1:10,000 dilution) proved to be the highest yet encountered."
Copyright:
This item may be under copyright protection; contact the copyright owner for permission before re-use.