Figure 7

Primary fate determination. 1) A VPC differentiating into a primary fate cell in an extracellular microenvironment with a moderately high concentration of LIN-3 (2 in our model), 2) A VPC differentiating into a primary fate cell in an extracellular microenvironment with a high concentration of LIN-3 (3 in our model), 3) A VPC differentiating into a primary fate cell in an extracellular microenvironment with lateral signal and a high concentration of LIN-3 (3 in our model), 4) A secondary fate cell transdifferentiating into a primary fate cell in an extracellular microenvironment with a high concentration of LIN-3 (3 in our model).