This directory contains all of the code, Python 3 scripts, Grace plotting tool project (.agr) files, and simulation data necessary for reproducing the following reference: Krist, K.T.; Sen, A.; Noid, W.G. "A simple theory for molecular chemotaxis driven by specific binding interactions." J. Chem. Phys. 2021, 155, 164902. => 'sourceCode' directory contains software written in Fortran 90, as well as instructions for compiling and running the code in an HPC environment. A sample run.sh script and input files are also provided. => 'simulationData' directory contains all data necessary for generating the figures presented in the main paper and the supplmentary material. => 'figures' directory contains the .agr (Grace project file) used to generate each figure, as well as the corresponding .eps and .png files. This work was performed by Dr. Kathleen Krist (kathleen.krist@northwestern.edu), Prof Ayusman Sen (asen@psu.edu), and Prof W. G. Noid (wgn1@psu.edu).