Open Source Tcl Chemistry Software

vmdStore provides a user-friendly interface to free install VMD plugins. vmdStore also helps you keeping the plugins always updated. Minimum Requirements Operating System: macOS, Linux, or Windows Visual Molecular Dynamics (VMD) 1.9.3 or later

ProtoFit is software for modeling the acid/base behavior of surfaces. The software is used for parameterizing surface protonation models and for visualization of potentiometric titration data.

The Xtal System is a comprehensive suite of small molecule structural solution, refinement and analysis software, supporting both X-ray, neutron and electron diffraction data. It runs on both Unix and MS Win32 platforms and uses tcl/tk graphics.

ASCEND is a modelling environment and solver for large or small systems of non-linear equations, for use in engineering, thermodynamics, chemistry, physics, mathematics and biology. Solvers for both steady and dynamic (NLA & DAE) problems, are provid

ECTk, the electrochemical tool kit, is a command line based application built on Tcl. It allows to define electrochemical experiments either interactively or via a script file sourced by ECTk. Virtually any potensiostat can be driven, the only condition being that the instrument has analogue inputs and outputs. ECTk is developed and maintained by the Electrocatalytic Green Engineering Group at Concordia University. ECTk communicates via any analogue IO board supported by the comedi library. This offers a great flexibility as a large number of IO boards are supported by comedi. ECTk is running under Linux and was developed under Linux Ubuntu. ECTk was developed with the aim to conduct experiments in electrochemistry with a great flexibility. In particular, ECTk can be extended to satisfy the needs for a particular application. It is for example possible to drive, besides a potensiostat, simultaneously other instruments like a rotating electrode set-up.

Given the chemical formula, MolWgt calculates the molecular weight of a substance.

NOSE is a package for simulation of linear and non-linear optical and infrared spectra, including absorption, fluorescence, circular dichroism, pump-probe, photon echo and other.

UPDATE: LATEST VERSION AT http://git.durrantlab.com//jdurrant/wisp Allostery can occur by way of subtle cooperation among protein residues (e.g., amino acids) even in the absence of large conformational shifts. Dynamical network analysis has been used to model this cooperation, helping to computationally explain how binding to an allosteric site can impact the behavior of a primary site often many angstroms away. Traditionally, computational efforts have focused on the most optimal path of correlated motions leading from the allosteric to the primary active site. We present a program called Weighted Implementation of Suboptimal Paths (WISP) capable of rapidly identifying additional suboptimal pathways that may also play important roles in the transmission of allosteric signals. Aside from providing signal redundancy, suboptimal paths traverse residues that, if disrupted through pharmacological or mutational means, could modulate the allosteric regulation of important drug targets.