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A Microbiological Assay for Vitamin B12Using Lactobacillus leichmannii.∗
- Source :
- Experimental Biology and Medicine; November 1949, Vol. 72 Issue: 2 p515-521, 7p
- Publication Year :
- 1949
-
Abstract
- A microbiological assay for vitamin B12using Lactobacillus leichmannii(ATCC 4797) has been developed. The assay medium contains crystalline amino acids as the nitrogen source and adsorbed tomato juice filtrate as a source of unidentified growth factors. A high level of cysteine and ferrous sulfate are present in the medium to keep it in the necessary reduced state. Data are given to show the degree of precision and reproducibility to be expected from the assay.
Details
- Language :
- English
- ISSN :
- 15353702 and 15353699
- Volume :
- 72
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- Experimental Biology and Medicine
- Publication Type :
- Periodical
- Accession number :
- ejs35582284
- Full Text :
- https://doi.org/10.3181/00379727-72-17485