Anti-oxidant enzymes in Cryptosporidium parvum oocysts
- 1 January 1997
- journal article
- research article
- Published by Cambridge University Press (CUP) in Parasitology
- Vol. 114 (1) , 13-17
- https://doi.org/10.1017/s0031182096008037
Abstract
Oocysts of Cryptosporidium parvum showed relatively low levels of SOD activity. The SOD which had a pI of 4.8 and an approximate molecular weight of 35 kDa appeared to be iron dependent. Catalase, glutathione transferase, glutathione reductase and glutathione peroxidase activity could not be detected, nor could trypanothione reductase. No NADH or NADPH oxidase activity could be detected, nor could peroxidase activity be demonstrated using o-dianisidine, guaiacol, NADPH or NADH as co-substrates. However, an NADPH-dependent H2O2 scavenging system was detected in the insoluble fraction.Keywords
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