|Title||Finding Alpha-Helices in Skeletons
(Tech Report) |
Nina Amenta, Sunghee Choi, Maria E. Jump, Ravi Krishna Kolluri, Thomas Wahl |
|Keyword(s)||Crystallography, Computational Geometry, Object Recognition|
|Institution||UT Technical Report|
We consider a problem which is part of the process of determining the three-dimensional structure of a protein molecule using X-ray crystallography: given an estimated map of the electron density of the molecule as a function on three-dimensional space, we identify regions
which are likely to belong to á-helices. Our approach is to compute a new kind of skeleton - the power shape - and then identify the helical substructures within the power shape with a variant of geometric hashing.