Membrino et al., PloS one 2011
(Urinary Bladder Neoplasms) :
The over-expression of MAZ and Sp1 synergistically activates HRAS transcription, while silencing each gene by RNAi results in a strong down-regulation of transcription
Ishii et al., Science 1986
:
In this system the presence of Sp1 is apparently required for c-Ha-ras1 transcription