1. Partial purification of the aminopeptidase from the midgut of the human body louse, Pediculus humanus humanus
- Author
-
Eva A. C. Oduor, Mabel Imbuga, Rachel Galun, Kosta Y. Mumcuoglu, and James O. Ochanda
- Subjects
biology ,Physiology ,Size-exclusion chromatography ,Midgut ,Aminopeptidase ,Enzyme assay ,Superose ,Biochemistry ,Insect Science ,Agarose gel electrophoresis ,biology.protein ,Human Body Louse ,Polyacrylamide gel electrophoresis ,Ecology, Evolution, Behavior and Systematics - Abstract
Summary The midgut of the human body louse Pediculus humanus humanus contains a thermally stable leucine aminopeptidase, which was detected by agarose gel electrophoresis using l-amino oxidase. Midgut extracts were homogenized in saline or in 1% Triton X-100 and the aminopeptidase was purified by Superose 6 gel filtration chromatography. A peak with enzyme activity that was extracted with or without Triton X-100 was eluted at a molecular weight 67–69 kDa. Non-denaturing polyacrylamide gel electrophoresis resolved one band of molecular weight of 69 kDa for samples that were extracted in a saline buffer. Two closely linked bands of molecular weight 67 kDa and 69 kDa were observed in samples that were extracted in 1% Triton X-100.
- Published
- 2000