From 41b3edaa39467a2965b467335a481f31a943c695 Mon Sep 17 00:00:00 2001 From: don Date: Tue, 17 Aug 2010 23:59:46 +0000 Subject: [PATCH] update kinetic formalism and add competion start git-svn-id: svn+ssh://hemlock.ucr.edu/srv/svn/misc/trunk/origins_of_life@611 25fa0111-c432-4dab-af88-9f31a2f6ac42 --- kinetic_formalism.Rnw | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/kinetic_formalism.Rnw b/kinetic_formalism.Rnw index c7ae0ad..2b19b6a 100644 --- a/kinetic_formalism.Rnw +++ b/kinetic_formalism.Rnw @@ -641,6 +641,58 @@ rm(grid) @ + +\subsection{Per-Lipid Kinetic Parameters} + +Each of the 5 lipid types have different kinetic parameters; to the +greatest extent possible, we have derived these from literature. + +\begin{table} + \centering + \begin{tabular}{c c c c c c c} + Type & $k_f$ & $k_b$ & Area (\r{A}$^2$) & Charge & CF1 & Curvature \\ + \hline + PC & $3.7\cdot 10^6$ & $2\cdot 10^{-5}$ & 63 & 0 & 2 & 0.8 \\ + PS & $3.7\cdot 10^6$ & $1.5\cdot 10^{-5}$ & 54 & -1 & 0 & 1 \\ + CHOL & $5.1\cdot 10^7$ & $2.8\cdot 10^{-4}$ & 38 & 0 & -1 & 1.21 \\ + SM & $3.7\cdot 10^6$ & $3.1\cdot 10^{-3}$ & 51 & 0 & 3 & 0.8 \\ + PE & $2.3\cdot 10^6$ & $10^{-5}$ & 55 & 0 & 0 & 1.33 \\ + \end{tabular} + \caption{Kinetic parameters of lipid types} + \label{tab:kinetic_parameters_lipid_types} +\end{table} + +\subsubsection{$k_f$ for lipid types} +For PC, $k_f$ was measured by Nichols85 to be $3.7\cdot 10^6 +\frac{1}{\mathrm{M}\cdot \mathrm{s}}$ by the partitioning of +P-C$_6$-NBD-PC between DOPC vesicles and water. The method utilized by +Nichols85 has the weakness of using NBD-PC, with associated label +perturbations. As similar measures do not exist for SM or PS, we +assume that they have the same $k_f$. For CHOL, Estronca07 found a +value for $k_f$ of $5.1\cdot 10^7 \frac{1}{\mathrm{M}\cdot + \mathrm{s}}$. For PE, Abreu04 found a value for $k_f$ of $2.3\cdot +10^6$. \fixme{I'm missing the notes on these last two papers, so this + isn't correct yet.} + +\subsubsection{$k_b$ for lipid types} + +$k_b$ for PC was measured by Wimley90 using a radioactive label and +large unilammelar vesicles at 30\textdegree C. The other values were +calculated from the experiments of Nichols82 where the ratio of $k_b$ +of different types was measured to that of PC. +See~\fref{tab:kinetic_parameters_lipid_types}. + +assigned accordingly. kb(PS) was assumed to be the same as kb(PG) given +by Nichols82 (also ratio from kb(PC)). +kb(SM) is taken from kb(PC) of Wimley90 (radioactive), and then a ratio of +kb(PC)/kb(SM) taken from Bai97: = 34/2.2 = 15.45; 2.0 x 10-4 x 15.45 = 3.1 x +10-3 s -1. +kb(CHOL) taken from Jones90 (radioactive; POPC LUV; 37°). + + +\subsubsection{Area for lipid types} + + \section{Simulation Methodology} \subsection{Overall Architecture} -- 2.39.2