Before revision:  The class of CFSTR atoms of multistationarity determines the entire class of multistationary fully open networks since possessing a CFSTR atom of multistationarity as an `embedded network' (N is embedded in G if N can be obtained from G by removing a finite subset of reactions and species) was proven recently to be a sufficient condition for a fully open network to admit multistationarity. We find that there are infinitely many one-reaction atoms, however the set of such atoms can be characterized using two types, each type containing two parameters. The first type contains one chemical species while the second type contains two chemical species; while both types contain one irreversible reaction. We identify both types with the chemical process of autocatalysis.
After revision:  The class of CFSTR atoms of multistationarity determines the entire class of multistationary fully open one-reaction networks are identified with the chemical process of autocatalysis.