VITAMIN B12 AND RELATED FACTORS IN THE NUTRITION OF LACTOBACILLUS LEICHMANNII 313

Walter A. Winsten, Edward Eigen

Journal of Biological Chemistry · 1949 · 31 citations · 0 references

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Abstract

4 In testing the different preparations, 10 ~1.samples containing 0.5 to 9.0 y per ml. of apparent vitamin Bn as meaaured by titrimetric microbiological assay were chromatographed.