QUOTE(highwind85 @ Jun 22 2010, 10:46 PM)
the kit's DNA range is 100bp-10kb...if you primer dimer is about 100bp, the kit might not be able to get rid one...
is it really dimer or a non-specific band of your product?
hmmm ...
doc said it's primer dimmer.
bocz previously it's not found in the result dnt know why suddenly appear.
bcoz i reduce the primer concentration end up no primer dimmer lo ~
i found that the PB buffer contain guanidine hydrocloride but the % is unknown. that why need supplement step for it ^^
i think it might be unspecific band or primer dimer for some product. i think 3.0 mM mgcl is quit high !! or may be is my partner pipetting skills problem bcoz she get primer dimer for all the result for today >.<
hope tomorrow still hv DNA sample for me, i wanna try different primer concentration. left 4 samples only. another one i felt i wanna reduce mgcl2 until 2.0 not 3.0 silently ^^
bcoz the primer clump up together make it >50bp lo ~ each primer 20bp only ! non-specific band may bind to the product too together with primer ~