association constant

constant /con·stant/ (kon´stint)

1. stable; not subject to change.

2. a quantity that is not subject to change.

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association constant  a measure of the extent of a reversible association between two molecular species.

Avogadro's constant  see under number.

binding constant  association c.

Michaelis constant  a constant representing the substrate concentration at which the velocity of an enzyme-catalyzed reaction is half maximal; symbol K M or K m.

sedimentation constant  see under coefficient.

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association constant

n.

A mathematical constant describing the bonding affinity of two molecules at equilibrium, especially the bonding affinity of an antibody and an antigen.