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sybil (version 1.1.2)

sysBiolAlg_moma-class: Class "sysBiolAlg_moma"

Description

The class sysBiolAlg_moma holds an object of class optObj which is generated to meet the requirements of the MOMA algorithm.

Arguments

encoding

utf8

Objects from the Class

Objects can be created by calls of the form sysBiolAlg(model, algorithm = "moma", ...). Arguments to ... which are passed to method initialize of class sysBiolAlg_moma are described in the Details section.

Extends

Class "sysBiolAlg", directly.

Methods

No methods defined with class "sysBiolAlg_moma" in the signature.

Details

The initialize method has the following arguments: [object Object],[object Object],[object Object],[object Object]

The problem object is built to be capable to perform the MOMA algorithm with a given model, which is basically the solution of a quadratic programming problem $$\begin{array}{rll} \min & \begin{minipage}[b]{5em} \[ \sum_{i,j=1}^n \bigl(v_{j,\mathrm{del}} - v_{i,\mathrm{wt}}\bigr)^2 \] \end{minipage} \[2em] \mathrm{s.\,t.} & \mbox{\boldmath$Sv$\unboldmath} = 0 \[1ex] & \alpha_i \leq v_i \leq \beta_i & \quad \forall i \in {1, \ldots, n} \[1ex] \end{array}$$ with $\bold{S}$ beeing the stoichiometric matrix, $\alpha_i$ and $\beta_i$ beeing the lower and upper bounds for flux (variable) $i$ ($j$ for the deletion strain). The total number of variables of the optimization problem is denoted by $n$. Here, $\mbox{\boldmath$v$\unboldmath}_{\mathrm{wt}}$ is the optimal wild type flux distribution. This can be set via the argument wtflux. If wtflux is NULL (the default), the wild type flux distribution will be calculated by a standard FBA. The optimization can be executed by using optimizeProb.

References

Segrè, D., Vitkup, D. and Church, G. M. (2002) Analysis or optimality in natural and pertubed metabolic networks. PNAS 99, 15112--15117.

See Also

Constructor function sysBiolAlg and superclass sysBiolAlg.

Examples

Run this code
showClass("sysBiolAlg_moma")

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