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# Steric Mass Action¶

IS_KINETIC

Selects kinetic or quasi-stationary adsorption mode: 1 = kinetic, 0 = quasi-stationary. If a single value is given, the mode is set for all bound states. Otherwise, the adsorption mode is set for each bound state separately.

 Type: int Range: {0,1} Length: 1/NTOTALBND
SMA_KA

Unit: $$m_{MP}^3~m_{SP}^{-3}~s^{-1}$$

 Type: double Range: $$\ge 0$$ Length: NCOMP
SMA_KD

Desorption rate constants

Unit: $$s^{-1}$$

 Type: double Range: $$\ge 0$$ Length: NCOMP
SMA_NU

Characteristic charges of the protein; The number of sites $$\nu$$ that the protein interacts with on the resin surface

 Type: double Range: $$\ge 0$$ Length: NCOMP
SMA_SIGMA

Steric factors of the protein; The number of sites $$\sigma$$ on the surface that are shielded by the protein and prevented from exchange with the salt counterions in solution

 Type: double Range: $$\ge 0$$ Length: NCOMP
SMA_LAMBDA

Stationary phase capacity (monovalent salt counterions); The total number of binding sites available on the resin surface

Unit: $$mol~m_{SP}^{-3}$$

 Type: double Range: $$\ge 0$$ Length: 1
SMA_REFC0

Reference liquid phase concentration (optional, defaults to $$1.0$$)

Unit: $$mol~m_{MP}^{-3}$$

 Type: double Range: $$\gt 0$$ Length: 1
SMA_REFQ

Reference solid phase concentration (optional, defaults to $$1.0$$)

Unit: $$mol~m_{SP}^{-3}$$

 Type: double Range: $$\gt 0$$ Length: 1