  Finding representative reaction pathways is necessary for understanding
mechanisms of molecular processes, but is considered to be extremely
challenging. We propose a new method to construct reaction paths based on mean
first-passage times. This approach incorporates information of all possible
reaction events as well as the effect of temperature. The method is applied to
exemplary reactions in a continuous and in a discrete setting. The suggested
approach holds great promise for large reaction networks that are completely
characterized by the method through a pathway graph.
