I'm currently using a Qiagen Kit for DNA extraction, I saw white precipitate in the P1 buffer, I was wondering if it's normal and will it effect my DNA yield ?
none of which should precipitate so would assume that the precipitate is likely to be the Rnase so ordering new buffer from qiagen seems to be a good idea as warming the buffer to redissolve the protein does not guarantee that its activity will be restored
(late reply but hope this may help anyone come across the same issue)
I have similar experience with Qiagen plasmid prep kit, but I realise my precipitate was due to the LyseBlue added to the P1 buffer. An unopened bottle of P1 with no added LyseBlue should be clear.