Class A (type D) CpG ODNs (CpG-A ODNs) contain a central palindromic phosphodiester (PO) CpG sequence and a PS-modified 3â poly-G tail. The poly G tails form intermolecular tetrads that result in high molecular weight ordered structures.
Why does a tornado form when cold and hot air meet? The collision of warm and cold air is not the direct cause of a tornado, nor is it absolutely necessary. When a cold air mass pushes into a warm air mass (this is called a câ¦old front) the warmer, less dense air is forced upwards.
Although some tornadoes come through Arkansas each year, rarely has one hit Hot Springs Village. On April 25, 2011, An EF3 tornado struck the gated community. It killed one person in Garland County before entering HSV causing some severe damage in a few areas, but no fatalities.