PT - JOURNAL ARTICLE AU - Winter, G. C. B. AU - Wratten, B. E. TI - An investigation into the use of activated and non-activated papain in routine rhesus blood grouping AID - 10.1136/jcp.15.6.503 DP - 1962 Nov 01 TA - Journal of Clinical Pathology PG - 503--507 VI - 15 IP - 6 4099 - http://jcp.bmj.com/content/15/6/503.short 4100 - http://jcp.bmj.com/content/15/6/503.full SO - J Clin Pathol1962 Nov 01; 15 AB - The activities of three commercial products of papain were compared as supplied and after activation, and when used in the enzyme-serum method for rhesus (D) grouping. Certain dangers in activation became apparent, and accurate determination of the proportions of papain to anti-D appeared more important than indiscriminate activation without reference to the initial enzyme activity. A technique for assessing these proportions is described.