Model is underconstrained.
The following variables couldn't be defined:
 * M in component M
 * k1 in component model_parameters
 * k2 in component model_parameters
 * gx in component model_parameters
 * fp in component model_parameters
 * gp in component model_parameters
 * k5 in component model_parameters
 * k6 in component model_parameters
 * fp1 in component model_parameters
 * gp1 in component model_parameters
 * g1 in component model_parameters
 * gp3 in component model_parameters
 * g3 in component model_parameters
 * g2 in component model_parameters
 * gp2 in component model_parameters
 * x in component model_parameters
 * h in component model_parameters
 * d/dt M in component M
 * d/dt Mp in component Mp
 * d/dt AMp in component AMp
 * d/dt AM in component AM