PT - JOURNAL ARTICLE AU - I Johnson AU - M Rose TI - Measurement of red cell folate with 75Se-selenofolate radioassay. AID - 10.1136/jcp.31.1.47 DP - 1978 Jan 01 TA - Journal of Clinical Pathology PG - 47--49 VI - 31 IP - 1 4099 - http://jcp.bmj.com/content/31/1/47.short 4100 - http://jcp.bmj.com/content/31/1/47.full SO - J Clin Pathol1978 Jan 01; 31 AB - 75Se-selenofolate radioassay was adapted for the purpose of red cell folate measurement. The results of assay of 124 whole blood samples by Lactobacillus casei microbiological assay and by radioassay using the adapted selenofolate method were concordant (r = 0.8). Red cell folate levels by the radioassay were below 170 microgram/1 in people who had haematological features of folate depletion. The distribution of results among reputedly healthy subjects extended down to 140 microgram/1.