blood RT6.1 cell count blood T lymphocyte count to total lymphocyte count ratio blood RT6.1 positive cell count to total lymphocyte count ratio 2014-05-14T13:09:33Z A calculated measurement in which the number of lymphocytes expressing the RT6.1 antigen on their surface in a specified sample of blood is divided by the total number of lymphocytes in the sample, and the result presented as a ratio, fraction, quotient or percentage. RT6 is a surface marker expressed in rodents on most mature peripheral T lymphocytes but not on thymocytes or on other haematopoietic cells. CMO:0002356 JSmith VT:0006387 blood RT6.1 cell percentage blood RT6.1 positive cell count as percentage of total lymphocytes clinical_measurement_ontology