Donald L. D. Caspar ( born January 8 , 1927 ) is an American structural biologist ( the very term he coined ) known for his works on the structures of biological molecules , particularly of the tobacco mosaic virus .
Donald L. D. Caspar ( born January 8 , 1927 ) is an American structural biologist . He is known for his works on the structures of biological molecules such as tobacco mosaic virus .