primers of human housekeeping gene

[Maggi Burton]

Hello,
       I am looking for some primers of human housekeeping gene that I
could use to realise RT-PCR. The expression fo these
       genes has to be unchanged after exposure of human endothelial cells
under hypoxia. I know for example that GAPDH gene
       expression is affected by hypoxia. If anybody has some suggestions,
I would be very pleased.
       Thank you, 
       Maggi Burton