1. EC 1.1.1.18. For the enzyme from Aerobacter aerogenes, see this series, Vol. 5 [36].
2. J. B. Walker, unpublished data.
3. This volume [21].
4. This volume [23].
5. Biosynthesis of the Monoguanidinated Inositol Moiety of Bluensomycin, a Possible Evolutionary Precursor of Streptomycin