PROS1 and neoplasm: At day 45 post-inoculation 6 out of 7 remaining PSA-transgenic mice showed significant growth delay [naïve: 307.6 mm3, WT: 184.8 mm3, PSA-Tg(6/7): 73.11 mm3, p = 0.01] and only 1 mouse showed complete lack of tumor memory [PSA-Tg(7/7: 128.6 mm3, p = 0.11].