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Vitellin polypeptides are proteolytically processed in ovarian follicles and embryos of the stick insect Carausius morosus. Data show that vitellin polypeptide A 3 of 54kDa is processed to yield polypeptide A 3* of about 48kDa upon completion of ovarian development, whereas vitellin polypeptide A 2 of 90kDa yields polypeptide E 9 during embryonic development. As...
A monoclonal antibody raised against ovarian follicles of the stick insect Carausius morosus reacted with two related polypeptides of 157 and 85 kDa in both the ovary and the hemolymph. In vitro cultured fat body proved capable of releasing the 157-kDa polypeptide into the culture medium and processing it to the lower-molecular-weight polypeptide of 85 kDa. This was further demonstrated by in vitro...
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