Lect. 6 composition & Architecture of plant viruses
Lect. 6 composition & Architecture of plant viruses
Lect. 6 composition & Architecture of plant viruses
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Detailed worked by using<br />
• X-ray defraction gave details <strong>of</strong> arrangement <strong>of</strong><br />
protein subunits and RNA in rod.<br />
• The particles comprises ~2130 subunits that are<br />
closely packed in a helical array.<br />
• The pitch <strong>of</strong> helix is 2.3 (fig.) and the RNA chain is<br />
compactly coiled in a helix following that <strong>of</strong> the<br />
protein subunits<br />
• There are 49 nt. & 161/3 protein subunits per turn<br />
• The PO4 <strong>of</strong> the RNA are at about 4nm from the rod<br />
axis.<br />
• The helix <strong>of</strong> TMV is right handed (Finch, 1972)
Change language