It turned out the cell that we were trying to transplant into had a nuclease, an enzyme that chews up DNA on its surface, and was happy to eat the synthetic DNA that we gave it and never got transplantations.
La cellula in cui volevamo fare il trapianto possedeva una nucleasi, un enzima che degrada il DNA e che era felice di mangiarsi il DNA sintetico che le davamo e non riuscimmo a realizzare nessun trapianto.