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PKA

   Also found in: Acronyms, Encyclopedia, Wikipedia 0.04 sec.
pK a /pK a/ the negative logarithm of the ionization constant (K) of an acid, the pH of a solution in which half of the acid molecules are ionized.
PKA,
abbreviation for protein kinase.
p,
n a mathematical function analogous to the calculation of pH. It is the negative log (p) of the constant of acid dissociation (
Ka). When the p
Ka of a buffering agent equals the pH of the solution to be buffered, the buffering system is most effective. According to the Henderson Hasselbach equation, p
Ka = pH + log ([HOAc]/[OAc-]).


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