In the present study, the determination of the cell viability effect of the CPS from the marine bacterium P. marincola KMM 277T was performed on human colorectal adenocarcinoma HT-29, Burkitt’s lymphoma Raji, acute monocytic leukemia THP-1, and acute promyelocytic leukemia HL-60 cells. The gene discussed is CAD; the disease is acute monocytic leukemia.