SMAD4 is a tumor suppressor gene located on chromosome 18 th…
SMAD4 is a tumor suppressor gene located on chromosome 18 that often shows reduced gene expression in human lung cancer. You perform a microarray using tissue from a normal person (green) and a lung cancer patient (red). What ratio of red to green fluorescence would you expect for SMAD4 gene expression if the patient’s tumor shows reduced SMAD4 gene expression?