Euchromatic genes 5 A1 J1 n* |* Y+ y9 Q0 K' @may be silenced and even exhibit a variegated phenotype when) C8 q& d' J3 E% A% O
juxtaposed to heterochromatic sequences following chromosomal 3 J- g1 {. n" {( mrearrangement or transposition 。* s) M/ e9 X. A( Q9 X f Z
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The two main chromatin states are heterochromatin and 2 l+ r, }2 ~7 z8 @euchromatin. Heterochromatin exists in various tightly bound6 V6 F. J+ z$ h7 R' m' P+ \
conformations. Euchromatin is less condensed and most often, j+ ?, k1 y; M6 V5 ~. O: [
associated with transcriptional activation. Euchromatic genes: Y; J# D. ?2 ?5 |' ]" y
may be silenced and even exhibit a variegated phenotype when & U, ]0 _0 {7 V, q0 ]4 q y1 Q3 @juxtaposed to heterochromatic sequences following chromosomal 2 `' c0 G* M& |+ M% ]6 @rearrangement or transposition; O" U' Q) _- @- B$ L
这是一整段。本文讲染色体包装的作者: ndwzf 时间: 2011-9-6 12:59