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This work presents a contribution to the literature on methods in search of lowdimensional models that yield insight into the equilibrium and kinetic behavior of peptides and small proteins. A deep understanding of various methods for projecting the sampled configurations of molecular dynamics simulations to obtain a low-dimensional free energy landscape is acquired. Furthermore low-dimensional dynamic models for the conformational dynamics of biomolecules in reduced dimensionality are presented. As exemplary systems, mainly short alanine chains are studied. Due to their size they allow for performing long simulations. They are simple, yet nontrivial systems, as due to their flexibility they are rapidly interconverting conformers. Understanding these polypeptide chains in great detail is of considerable interest for getting insight in the process of protein folding. For example, K. Dill et al. conclude in their review [28] about the protein folding problem that "the once intractable Levinthal puzzle now seems to have a very simple answer: a protein can fold quickly and solve its large global optimization puzzle simply through piecewise solutions of smaller component puzzles".