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Reprogramming in the absence of DNA synthesis in Galleria larval epidermis
Abstract:
Larval epidermal cells from a day-1 penultimate instar Galleria larva on implantation into day-5 last instar larva metamorphose and deposit a pupal cuticle at the same time as the host pupates. DNA synthesis in the implanted larval cell was monitored with 3-H-thymidine. Various regimens of 3-H-thymidine application were used and under no conditions did the larval cells incorporate label during the period from implantation to deposition of pupal cuticle. This suggests that a wax moth larval ectoderm cell can reprogram its genome to secrete a pupal cuticle without a precedent cell division.
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