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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Differential expression of aminopeptidase-N on human ovarian granulosa and theca cells.

The expression of aminopeptidase-N and neutral endopeptidase in human ovarian tissue was examined using specific monoclonal antibodies for each of these peptidases and histochemical staining for enzyme activity. Aminopeptidase-N is a membrane-bound metalloprotease catalyzing the removal of N-terminal amino acids from peptides and was detected by immunofluorescence staining on theca interna cells in secondary follicles and on luteinized thecal cells in preovulatory follicles and corpora lutea. However, aminopeptidase-N was not detected on granulosa cells. Peptidase activity was also detected by histochemical staining on theca interna cells and luteinized thecal cells. Luteinized granulosa cells showed peptidase activity, despite the lack of aminopeptidase-N. Neutral endopeptidase was not detected in ovarian granulosa and thecal cells. These observations indicate that aminopeptidase-N can be a useful surface marker for thecal cells.[1]

References

  1. Differential expression of aminopeptidase-N on human ovarian granulosa and theca cells. Fujiwara, H., Maeda, M., Imai, K., Fukuoka, M., Yasuda, K., Horie, K., Takakura, K., Taii, S., Mori, T. J. Clin. Endocrinol. Metab. (1992) [Pubmed]
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