housekeeping genes in PCR - (Jan/12/2011 )

Please name the housekeeping genes one can use for (mammalian) PCR analysis ?

Actin is the most famous one, buy the primers from Sigma,

Can also try GAPDH, but depends on the experiment too. For my case Actin didn't work fine so I ordered other housekeeping gene, one of them was 18S if I'm not wrong