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Present circuit rules commonly provide that the petition for allowance of an appeal shall be filed within the time allowed by Section 25 of the Bankruptcy Act for taking appeals of right . To facilitate the processing of your application , we ask that your recommenders send the letters of recommendation directly to us by fax ( 734-764-8180 ) or U.S. Mail . Zhaohui Xu , Ph.D. Protein-protein interaction and molecular recognition ; structural biology of protein folding , protein translocation , and cellular signal transduction ; x-ray crystallography . Characterization of protein kinases , phosphatases , and nucleotidy / transferases involved in signal transduction . This program exposes students to a broad spectrum of current research through innovative course structures and seminars . Ari Gafni , Ph.D. Spectroscopic studies of protein structure ; aging phenomena at the molecular level ; protein folding mechanisms in vitro and in vivo ; protein misfolding in aging and disease ; mechanisms of amyloid generation and deposition in diabetes and Alzheimer 's disease .