Abstract
Tunicamycin, a glucosamine-containing antibiotic inhibited the conjugation process of Tetrahymena pyriformis. Sexual pairing was prevented completely when 1.5 μg/ml of tunicamycin was added to a mixture of the two mating types. Tunicamycin caused preferential inhibition of glycoprotein synthesis in Tetrahymena pyriformis. At 1.5 μg/ml and 6 μg/ml tunicamycin inhibited by 40% and 60% respectively [ 3H]-glucosamine incorporation into material precipitated by ethanol, while it did not affect [ 14C]-leucine incorporation. Cell division was also inhibited when the drug was added either to the regular growth medium or to the starvation medium.
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