Developmental changes in the levels of SDS-extractable polypeptides during plastid morphogenesis
Tóm tắt
A quantitative estimation of the levels of plastidic SDS-extractable polypeptides as separated by polyacrylamide gel electrophoresis is described to demonstrate the practicality of such an approach. Using an internal standard of cytochrome c and expressing all polypeptide levels as cytochrome c relative stain equivalents, the levels of most polypeptides from developing Avena plastids change relative to the period of greening especially over the period 12–20 h. Some changes in certain polypeptides can be shown to be due to plastid senescence rather than plastid development. There is also a distinct difference in the pattern of polypeptides when plastids are isolated from different laminar regions. An incubation study using etioplasts showed of the original 8 polypeptides, six were retained, two were lost, another two were formed during incubation but eleven polypeptides found in the in situ study never appeared.
Tài liệu tham khảo
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