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A 50th Order Reaction Predicted and Observed for Sickle Hemoglobin Nucleation
Journal article   Peer reviewed

A 50th Order Reaction Predicted and Observed for Sickle Hemoglobin Nucleation

Zhiqi Cao and Frank A Ferrone
Journal of molecular biology, v 256(2)
1996
PMID: 8594190

Abstract

assembly polymerization stochastic kinetics photolysis
Sickle hemoglobin polymerization exhibits a striking sensitivity to initial concentration, with characteristic reaction times that exhibit |similar|30th power dependence on the concentration. This extraordinary reaction order is encompassed by a novel double nucleation mechanism that predicts |similar|50th power dependence of the homogeneous nucleation rate. Using a technique that allows individual homogeneous nucleation events to be monitored, we have measured a concentration dependence of 47±5, in excellent agreement with the predictions of the model. Absolute nucleation rates agree with predictions as well.

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Biochemistry & Molecular Biology
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