Answer:
Florey and Chain – identification of Penicillium as the producer of penicillin
Explanation:
Alexander Fleming was observed that the Penicillium mold growing in the plate of bacteria inhibited the growth of the bacterial colony. He observed a clear area around the Penicillium mold. He could not purify penicillin. Florey and Chain obtained the cultures of Penicillium from Fleming and set the method for purification of the antibiotic from the culture so that it can be tested on other organisms. With the help of a biochemist Norman Heatley, Florey and Chain devised the purification technique and purified penicillin.
