Karl Landsteiner quotes

Karl Landsteiner was an Austrian scientist and physician who discovered the major human blood groups. His groundbreaking work enabled safe blood transfusions and had a lasting impact on medicine. He is considered the founder of modern transfusion medicine. Here are 2 of his quotes:

Owing to the difficulty of dealing with substances of high molecular weight we are still a long way from having determined the chemical characteristics and the constitution of proteins, which are regarded as the principal con-stituents of living organisms.

Karl Landsteiner