Release of amplified ribosomal DNA from the chromomeres of Acheta.
نویسندگان
چکیده
The major chromomeres of pachytene chromosomes 6 and 11 in the oocytes of Acheta (Orthoptera) are regions of amplification for ribosomal RNA cistrons (28 S and 18 S). During late prophase the amplified DNA copies are released from the chromomeres, which decrease in size as the amount of DNA decreases. The number of nucleotide pairs released from the major chromomere of chromosome 11 is about 1.38 x 10(9).
منابع مشابه
The three-dimensional organization of the amplified ribosomal DNA complex in Acheta.
The major chromomere of pachytene chromosome 6 in the oocytes of Acheta (Orthoptera) is a region of amplification for ribosomal RNA cistrons (28 S and 18 S). This chromomere was isolated and studied with the scanning electron microscope. It has an outer shell that is smooth at early stages but divides into polygonal plates as indentations appear on its surface. These indentations increase in nu...
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ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 70 1 شماره
صفحات -
تاریخ انتشار 1973