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Experience with microbiological assay for folate using a chloramphenicol-resistant L. casei strain
  1. I. Chanarin,
  2. Rita Kyle,
  3. Jennifer Stacey
  1. Department of Haematology, Northwick Park Hospital, Harrow, Middlesex
  2. Clinical Research Centre, Watford Road, Harrow, Middlesex

    Abstract

    Experience with a semi-automated L. casei folate assay using a chloramphenicol-resistant strain of organism is described. Control of pH of medium and incubation time was required. The normal range for serum folate was 2 to 16 ng/ml and red cell folate 200 to 600 ng/ml.

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