Kim K H, Blatt L M, Cohen P P
Science. 1967 Apr 14;156(3772):245-6. doi: 10.1126/science.156.3772.245.
Actinomycin D and thyroxine interact in solution (pH 8 to 10), as revealed by changes in the absorbance of actinomycin D. Thyroxine can prevent the growth-inhibitory effect of actinomycin D on Bacillus subtilis if it is present in a molar ratio of 3000 (thyroxine to actinomycin D).