ds-DNA
Java version
HTML 5 version (does not require Java; downloads and moves
slowly)
I. Introduction
dsDNA is a negatively charged polyanion. It must be packed into
a form which somehow minimizes the significant electrostatic
repulsive forces. It does so in Eukaryotes by packing around a core
of positively charged histone proteins (2 copies each of H2A, 2B, 3
and 4) into a structure called the nucleosome.
For more information see
Biochemistry Online: Chapter 5D - Binding and the Control of Gene
Transcription
II. General Structure
Wireframe
Antiparallel strands: 1 strand: 5' PO4,green,3' red ;other: 5' PO4
blue, 3' yellow
DNA Cartoon
View DNA's H-bonds
AT base pair
GC base pair
Spacefill Model - Major/Minor Groves
Spacefill Model - Major/Minor Groves with O's (red) and N's (blue
with Hs not shown) available in the major grove for H bonds to
proteins
surface of DNA