Dorothy Mary Hodgkin OM FRS ( 12 May 1910 -- 29 July 1994 ) , nÃ e Crowfoot , was a British chemist , credited with the development of protein crystallography . Dorothy Mary Hodgkin OM , FRS ( 12 May 1910 -- 29 July 1994 ) , nÃ e Crowfoot , was a British chemist , credited with the development of protein crystallography .