[Paramagnetism of activated amino acids]

In continuation of magnetic work on intracellular active fractions, the author, as in first part of previous work, studies the biological synthesis of proteins. He shows that in activating AA, ATP gives them strong paramagnetism and the data values of massic susceptibilities for 21 of them are given. The homogeneity of results suggest the appearance of one free electron and subsequent paramagnetism.