the correlation between the eosinophilic leucocyte population and the phospholipase b activity of rat tissues has been tested with isolated cell preparations from intestine , lung , blood , bone marrow and spleen containing eosinophils in varying proportions and with pure eosinophil fractions separated by centrifugation on discontinuous metrizoate and metrizamide gradients .
C0005953
bone marrow
C0014467
fractions