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- W2148785543 abstract "A series of Pro peptides containing the sequence of the oostatic hormone 3d and its shorter analogues 3a-3c differing in a number of the C-terminal Pro residues was prepared for a study of its effect on oogenesis in Sarcophaga bullata Parker (Diptera). Peptides 3a-3d were synthesized in solution by the fragment condensation of Boc-Tyr-Asp(OtBu)-Pro-Ala-Pro-OH (2f) with Pro oligopeptides H-(Pro)2-5-OtBu. The ammo-terminal protected pentapeptide acid 2f was prepared by a stepwise procedure from TFA-H-Ala-Pro-OMe using Boc-Pro-OH, Z-Asp(OtBu)-OSu and Boc-Tyr-OSu. The H(Z)-(Pro)2-5-OtBu oligopeptides 1a-1h were synthesized from Z-Pro-OH and H-Pro-OtBu by a combination of stepwise procedure and fragment condensation. The 125I-labeled molecules of the octapeptide 3b and decapeptide 3d were used for radiotracer distribution studies. Evidence of content of the labeled peptide material in various parts of the insect body (ovaries, head, intestine) is presented. The time distribution of the labeled material in the insect organs was correlated with results of histological analysis of ovaries treated by nonlabeled peptides. The peptides assayed affected processes of egg development in 20–60% of ovarioles. The decapeptide 3d caused changes consisting in some resorbed egg chambers and normal appearance of vitellogenic eggs, whereas the octapeptide 3b caused abnormal yolk deposition and formation of big eggs with irregular yolk granules, proliferation of follicular epithelium in some egg chambers and about the same amount of resorbed egg chambers as decapeptide. These structural differences are complementary to the different values of organ radioactivities. © Munkagaard 1997." @default.
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- W2148785543 date "2009-01-12" @default.
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- W2148785543 title "Synthesis, radiolabeling and biological activity of peptide oostatic hormone and its analogues" @default.
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- W2148785543 doi "https://doi.org/10.1111/j.1399-3011.1997.tb01180.x" @default.
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