ULTRASTRUCTURE OF E1+2+9+12 INVERSION BREAKPOINTS IN DROSOPHILA-SUBOBSCURA

被引：2

作者：

CUENCA, JB ^{[1
]}

SAURA, AO ^{[1
]}

SORSA, V ^{[1
]}

DEFRUTOS, R ^{[1
]}

机构：

[1] UNIV HELSINKI,DEPT GENET,SF-00100 HELSINKI 10,FINLAND

来源：

BIOLOGY OF THE CELL | 1990年 / 70卷 / 1-2期

关键词：

POLYTENE CHROMOSOMES; DROSOPHILA-SUBOBSCURA; ELECTRON MICROSCOPY; INVERSION BREAKPOINTS;

D O I：

10.1016/0248-4900(90)90359-B

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

The ultrastructure of the Drosophila subobscura chromosome regions around the breakpoints of the complex E1 + 2 + 9 + 12 gene arrangement was analyzed. This overlapping inversion is formed by the association of the E1, E2, E9, and E12 simple inversions. Ultrastructure of sections involving 58D/59A, 61C/D, 62D/63A, 64B/C, 67A/B, and 68B/C breakpoints on E(st) chromosomes were compared with the ultrastructure of sections involving 58D/68B, 62D/64C, 59A/63A, 64B/68C, 67B/61C, and 67A/61B breakpoints on E1 + 2 + 9 + 12 chromosomes. No detectable changes of structural organization on banding patterns induced by the E1 + 2 + 9 + 12 inversion were found. Ultrastructural analysis of the two E12 breakpoints has, however, facilitated the analysis of the left boundary of E12 inversion. Accordingly, we propose 61B/C as a new breakpoint instead of 61C/D.

引用

页码：39 / 51

页数：13

共 39 条

[1] THE INSITU STRUCTURE OF THE ACTIVE 75-S RNA GENES IN BALBIANI RINGS OF CHIRONOMUS-TENTANS [J].