Abstract
The effects of cycloheximide on synchronized Tetrahymena pyriformis strain GL‐C were investigated at concentrations ranging from 0.01 to 10 μg/ml. The initial inhibition of protein synthesis was nearly total (>85%) at 1 μg/ml and above, partial (50–80%) at 0.2 to 0.05 μg/ml, and slight (Tetrahymena is considered in the Discussion.