Mark C. Williams has been appointed a regular member of the Macromolecular Structure and Function C Study Section in the NIH Center for Scientific Review, for the term beginning July 01, 2011 and ending June 30, 2017. According to a letter from the Center for Scientific Review, members are selected on the basis of their demonstrated competence and achievement in their scientific discipline as evidenced by the quality of research accomplishments, publications in scientific journals, and other significant scientific activities, achievements and honors. Membership on a study section represents a major commitment of professional time and energy as well as a unique opportunity to contribute to the national biomedical research effort. Study sections review grant applications submitted to the NIH, make recommendations on these applications to the appropriate NIH national advisory council or board, and survey the status of research in their fields of science. These functions are of great value to medical and allied research in this country.