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Table 1 Initial conditions and rate coefficient values

From: Analysis of the quantitative balance between insulin-like growth factor (IGF)-1 ligand, receptor, and binding protein levels to predict cell sensitivity and therapeutic efficacy

Initial condition

Value

IGFBPs per cella

1.21 × 10−8 nmol/cell

IGF1R per cella

2.23 × 10−11 nmol/cell

Reference cell number N 0 a

116,000 cells/well

Rate coefficient

Value

Association rate coefficient of IGF1-IGF1R complex (k 1 )b

1 nM−1 hr−1

Dissociation rate coefficient of IGF1 and IGF1R (k −1 )b

1 hr−1

Association rate coefficient of IGF1-IGFBP complex (k 2 )b

1 nM−1 hr−1

Dissociation rate coefficient of IGF1 and IGFBP (k −2 )b

0.1 hr−1

Cell-mediated IGF1 depletion rate coefficient (k 3,0 )a

0.017 hr−1

  1. aExperimentally determined for OVCAR5 cells.
  2. bBased on K d = 1 nM for IGF1 with IGF1R and K d = 0.1 nM for IGF1 with IGFBPs [24],[26],[87]–[94].