it is chealeting agent and has great affinity with metal ions and mg- ions present in dnase as a cofactor and responsible for dnase action that degreded DNA hear edta bide with mg- ions and stop the action of dnase.
Its purpose is to isolate DNA from a protein mixture.
Sucrose performs the function of osmoregulation in the protocol of DNA isolation from blood
spooling of the DNA results from the addition of the ethanol which is insoluble in the solution. after we get he DNA in the form of spooling structure the solution is centrifuged. so we get the DNA.
mgcl2 work as a cofactor and they enhance the enzymatic reaction..
EDTA Prevents DNA DegradationEDTA, or ethylenediaminetetraacetic acid, captures or "chelates" metal ions out of solution, preventing them from participating in unwanted side reactions. In GTE buffer, EDTA is added at 10mM. Its primary purpose is in the buffer to round up free zinc, magnesium, and calcium, thereby preventing DNA degradation by certain pathways that require those metals.
Chelating agent
Its purpose is to isolate DNA from a protein mixture.
Sucrose performs the function of osmoregulation in the protocol of DNA isolation from blood
it act as as a cationic detergent for the isolation dna from the given sample
It solubilizes lipids and a lot of proteins to remove them from the DNA.
TE stands for Tris and EDTA. The Tris buffers the water to prevent acid hydrolysis of the DNA/RNA. The EDTA chelates divalent cations that can assist in the degradation of RNA.
It sequester carbohydrates in the solution
the role seveg in plant DNA extractions is to remove chlorophyll and similar pigments
phenol is used in order to remove protein impurities from the DNA to yield pure dna while chloroform prevents shearing of DNA during isolation.
NaCl provides Na+ ions that will block negative charge from phosphates on DNA. Negatively charged phosphates on DNA cause molecules to repel each other. The Na+ ions will form an ionic bond with the negatively charged phosphates on the DNA, neutralizing the negative charges and allowing the DNA molecules to come together
for cell lysis
It is an antioxidant.