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In SDS-PAGE complexes are separated to their subunits, proteins are denatured and covered by SDS molecules at a ratio of approximately 1 SDS molecule per 2 amino acids. Thus any charge that the protein might have is masked by he huge negative charge by the SDS molecules and migration and thus separation of proteins depends mainly on their size.
That's why SDS page is commonly used for determing approximate molecular weight of proteins, for following the progress of protein purification, etc.
In native PAGE proteins retain their natural fold and can remain in complex. So the migration depends on the charge of the protein, the size, shape and if it is in complex with other molecules or if it oligomerizes.
For a example a protein that forms tetramers will give one band in an SDS-PAGE that corresponds to the monomer (provided that denaturation is complete) while on a native PAGE it can give more than one band, depending on the amount of each species (monomer, dimer, trimer, tetramer)
From native PAGE usually in combination with other techniques you can see the oligomerization state of your protein or study complexation reactions like protein-DNA (band-shift assays).
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∙ 13y ago
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Why is denaturing sds-page used for running sds-page electrophoresis of egg-white lysozyme and not non-denaturing page?
may be because of toomany disulfide linkages
What is the function of glycine in sds page?
glycine molecular weight high so mobility also high so using in SDS PAGE
Why p53 is run as 53 kda on sds page?
Due to many proline residues it migrates slower on sds page and appears heavier than it is.
What are the drawbacks of sds page?
The major drawback is that treatment with SDS denatures the protein, meaning you are not looking at it in its natural state.
What is Laemmli gels?
It is the gel of choice for SDS PAGE
Are SDS and SDS-plus bits the same?
The short answer to your question is "yes". I found myself researching the same question a few days ago and found that the real difference is between SDS/SDS Plus and SDS Max. I don't recall the exact dimension now, so I won't try to quote it, but the Max is a larger size. The answer I found was enough to tell me I used SDS (SDS Plus), and those were the bits I needed to buy. Once I knew that, I didn't need to remember the size of SDS Max...they were too big for my drill. Last point, SDS Plus is sometimes shortened to SDS+.
Who discovered SDS PAGE electrophoresis?
Laemmli U. K.
What is the difference between CTAB and SDS method?
This refers to the type of detergent used to lyse cell membranes when extracting DNA from cells. SDS=Sodium dodecyl sulfate, CTAB=Cetyl trimethylammonium bromide
What is the difference between an SDS drill and a hammer drill?
The SDS drill is considered to be the superior option for efficiency and ease of use, it does not require a chuck key. The hammer drill requires a chuck key for fitting different drill bits, which is considered the main difference of the drills.
What test has replaced the radial immunodiffusion test?
SDS-PAGE method
What is role of glycine in SDS-PAGE?
Glycine increases the mobility of the gel.
What method could you use to further separate two bands from the same protein fraction after SDS-PAGE?
Electrophoresis is the method that could be used to further separate two bands from the same protein fraction after SDS-PAGE.
