Before revision:  In particular, recently, scientists have been able to build in-vitro reaction kinetics ( among enzymatic proteins and their ligands{\em  ) which code for two-inputs logic gates mimicking the stochastic AND ( NAND) and the stochastic OR ( NOR), beyond simpler and already known single-input gates (  as YES and NOT),  the whole triggering prompt effort even from the theoretical counterpart. To this task, several allosteric receptor-ligand systems are hereby described according to the Monod-Wyman-Changeaux model:
After revision:  In particular, recently, scientists have been able to build in-vitro reaction kinetics ( among enzymatic proteins and their ligands{\em ) which code for two-inputs logic gates mimicking the stochastic AND ( NAND) and the stochastic OR ( NOR), beyond simpler and already known single-input gates ( as YES and NOT), the Monod-Wyman-Changeaux model: