{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T05:56:42Z","timestamp":1779343002719,"version":"3.51.4"},"reference-count":37,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2005,2,6]],"date-time":"2005-02-06T00:00:00Z","timestamp":1107648000000},"content-version":"vor","delay-in-days":4419,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Dev. Genet."],"published-print":{"date-parts":[[1993,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>To determine differences in the patterns of expression of <jats:italic>Drosophila<\/jats:italic> small heat shock proteins (shsp) during normal development in the absence of stress, proteins obtained from head, thorax and gonads of young (0\u201312 h, 3 days), middle\u2010aged (3\u20136 days) and 15\u2010 to 20\u2010day\u2010old adult flies were separated on SDS\u2010PAGE gels and blotted with monoclonal antibodies against hsp23 and hsp26. hsp23 was found in the heads and gonads of young males and females. In contrast, the maximum expression of hsp26 was seen in gonads of young flies, and it was only lightly detected in the brain. The expression of both proteins decreased as flies aged. This age\u2010related decrease was particularly striking for hsp23 in females. The immunoblot results obtained were complemented by immunostaining of thin parasagittal sections of whole fly bodies Hsp23 was found to be expressed in the brain, thoracic ganglion, fat body and gonads of young (0\u201012 h) males and females. On the other hand, hsp26 was essentially detected in ovaries and testes of these young flies. The analysis of the tissue expression of both proteins demonstrate that each shsp has a distinct cellular localization. In the central nervous system, hsp23 and hsp26 were present in the neurocytes of the brain and the thoracic ganglion. In addition, hsp23 (but not hsp26) was also detected in the central neuropile of these two organs. In testis, hsp26 was localized in the cytoplasm of spermatocytes and, probably, in the spermatid bundles. In contrast, hsp23 was detected at the periphery of cells (membranes). In ovorioles of newborn females the expression of hsp26 was stronger, and the maximum expression of hsp23 was only reached in older (2 days and more) flies. These results demonstrate that each shsp possesses a specific spatial and temporal pattern of expression in adults of <jats:italic>Drosophila.<\/jats:italic> The distinct tissue\u2010specific and age\u2010dependent expression of hsp23 and hsp26 suggests that these two proteins may have different functions in crucial organs of <jats:italic>Drosophila<\/jats:italic>. \u00a9 1993Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/dvg.1020140109","type":"journal-article","created":{"date-parts":[[2005,5,25]],"date-time":"2005-05-25T22:34:35Z","timestamp":1117060475000},"page":"69-77","source":"Crossref","is-referenced-by-count":56,"title":["hsp23 and hsp26 exhibit distinct spatial and temporal patterns of constitutive expression in <i>Drosophila<\/i> adults"],"prefix":"10.1002","volume":"14","author":[{"given":"Raquel","family":"Marin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean 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