Solved at last is another great scientific mystery: the structure of the most powerful known chemicalbiotin, a rare, growth-promoting vitamin of the B-complex group. Significance: knowledge of its structure may well lead to synthetic manufacture of biotin. So far not more than one-tenth of an ounce of pure biotin has been isolated. Cost: more than $400,000.
Biotin is so potent that it stimulates the growth of yeast cells even when diluted to one part in 500,000,000,000. One gram dissolved in 25,000,000 gallons of water is enough to meet the vital needs of bacteria. All higher forms of life, including man, also need...
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