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.
Hot dark matter is a form of dark matter which consists of particles that travel with ultrarelativistic velocities.ue to theory, in order to explain small scale structure in the Universe, it is necessary to invoke cold dark matter (CDM) or warm dark matter. Hot dark matter as the sole explanation of dark matter is no longer viable, therefore, it is nowadays considered only as part of a Mixed dark matter theory.