Dorothy Mary Hodgkin (12th May 1910-29th July 1994) aka crowfoot was a British Biochemist who was known for her knowledge on Protein and X-Ray Crystallography which are methods used to determine three dimensional figures of Bio-molecules. Some of her most influential discoveries are the confirmation of the structure of Penicillin and structure of vitamin B12. She was the third woman who won the Nobel prize in Chemistry. 12th May 2014 is her 104th Birth Anniversary, not only that 2014 is the International Year of Crystallography.
The below First Day Cover and top four stamps from sheet were issued this year to commemorate the International Year of Crystallography.