Model is underconstrained.
The following variables couldn't be defined:
 * n in component environment
 * pr2 in component recycling_probability
 * eta in component recycling_probability
 * Ag_min in component antigens
 * K_AgAb in component antigen_antibody_complexes
 * theta in component antigen_antibody_complexes
 * s in component selection_probability_of_centrocytes
 * s1 in component selection_probability_of_centrocytes
 * s2 in component selection_probability_of_centrocytes
 * zeta in component selection_probability_of_centrocytes
 * mu in component centrocytes
 * mu1 in component centrocytes
 * mu2 in component centrocytes
 * M11 in component centrocytes
 * M12 in component centrocytes
 * M21 in component centrocytes
 * M22 in component centrocytes
 * d/dt Ag in component antigens
 * d/dt Ab in component antibodies
 * d/dt K_AgAb in component antigen_antibody_complexes
 * d/dt B in component centroblasts
 * d/dt B1 in component centroblasts
 * d/dt B2 in component centroblasts
 * d/dt C in component centrocytes
 * d/dt C1 in component centrocytes
 * d/dt C2 in component centrocytes
 * d/dt Cs in component selected_centrocytes
 * d/dt Cs1 in component selected_centrocytes
 * d/dt Cs2 in component selected_centrocytes
 * d/dt M in component memory_cells
 * d/dt M1 in component memory_cells
 * d/dt M2 in component memory_cells
 * d/dt AFC in component antibody_forming_cells