  The three-dimensional structures of two common repeat motifs
Val$^1$-Pro$^2$-Gly$^3$-Val$^4$-Gly$^5$ and
Val$^1$-Gly$^2$-Val$^3$-Pro$^4$-Gly$^5$-Val$^6$-Gly$^7$-Val$^8$-Pro$^9$ of
tropoelastin are investigated by using the multicanonical simulation procedure.
By minimizing the energy structures along the trajectory the thermodynamically
most stable low-energy microstates of the molecule are determined. The
structural predictions are in good agreement with X-ray diffraction
experiments.
