The "Unknown Factor" in the Growth of Saccharomyces cerevisiae.

Basal medium...................... 52.5 58.7 61.1 57.4 58.4 62.6 46.3 60.1 0.05% yeast extract added.......... 73.5 76.7 79.4 80.1 71.3 67.2 78.6 78.5 All vitamins doubled............... 70.1 77.8 75.3 76.1 67.9 68.2 75.1 71.6 Double vitamins plus 0.05% yeast extract .......................... 73.4 76.8 79.4 79.5 71.8 67.6 78.5 78.6 Only the thiamin doubled.......... 55.1 56.2 59.8 59.1 57.8 61.3 49.8 60.3 Only pyridoxin doubled............ 53.9 57.1 60.4 57.9 57.6 64.1 52.8 57.9 Only calcium pantothenate doubled 58.7 60.2 66.5 64.4 64.1 61.2 61.3 62.6 Only inositol doubled.............. 65.8 63.8 61.3 58.8 63.2 65.4 61.3 65.4 Only biotin doubled. 57.7 56.2 61.9 62.2 56.8 66.2 48.4 59.2 Only inositol and biotin doubled .. 66.1 65.7 67.8 62.5 64.9 70.2 65.8 66.4 Only inositol and calcium pantothenate doubled ................... 66.6 71.4 71.9 69.8 65.7 64.1 70.7 67.4 Only biotin and calcium pantothenate doubled...................... 56.7 67.1 71.4 70.4 67.8 68.2 61.1 67.9 Only calcium pantothenate, inositol and biotin doubled............... 72.6 74.7 78.5 74.6 72.2 69.5 75.4 71.8