There were several steps to this. There were two sides: We had to solve the chemistry for making large DNA molecules, and we had to solve the biological side of how, if we had this new chemical entity, how would we boot it up, activate it in a recipient cell.
Por lo tanto, hubo varios pasos para llegar a esto. Había dos aspectos. Teníamos que resolver la química para la fabricación de moléculas grandes de ADN, y teníamos que resolver el aspecto bilógico de cómo, si teníamos esta entidad química, cómo lo ibamos a hacer arrancar, activarlo, en una célula receptora.