Fig. 1
From: Layering genetic circuits to build a single cell, bacterial half adder
Simplified schematics of the biological half adder, comprising independent modules of the AND, OR and NOT gates layered in series and in parallel. a Logic output of biological half adder. b In the presence of two inputs, the AND gate is activated to produce GFP and lambda repressors, which further inactivates the OR gate to suppress RFP expression. c In the presence of either inputs singly, only the OR gate is activated to trigger RFP expression