What is mock methylation and how does it differ from actual methylation?

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Mock methylation refers to a type of negative control reaction used in biological experiments to differentiate between actual methylation processes and those that do not involve the addition of methyl groups. It typically involves incubating a substrate with methylase in the absence of S-adenosyl methionine (SAM), which is necessary for genuine methylation to occur. This method helps researchers understand the effects of methylation by providing a baseline for comparison. The discussion highlights that while methylation can occur on various biological molecules, including DNA and proteins like histones, mock methylation serves primarily as a control to validate experimental results.
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Can anyone explain mock methylation. The best explanation that I've been able to coax out of the internet is (incubation with methylase in the absence of SAM (S-adenosyl methionine)). I don't know how this sort of methylation gets done, what gets added onto cytosine and how mock methylation differs from actual methylation. Help, please.
 
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In what context did you encounter the term "mock methylation." There are many different types of methylation reactions in biology (e.g. proteins, for example the tails of histone proteins, can also be methylated). My guess would be that these mock methylation reactions are just negative control reactions.
 
I found out that as well i.e. mock methylation are basically negative control reactions. Thanks Ygggdrasil for confirming it.
 
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