A leucine aminopeptidase was purified from the oocysts of Eimeria falc
iformis using affinity chromatography and gel filtration techniques. I
t had a molecular weight of 45-50 kDa. Its maximal activity against le
ucyl-p-nitro anilide was at pH 8.6. It is a metallo-enzyme highly inhi
bited by bestatin. (C) Inra/Elsevier, Paris.