text_1: The PRDM1 gene, when combined with the PRDM14 gene, plays an important role during primordial germ cell specification.
text_2: Blimp1 (Prdm1), the key determinant of primordial germ cells (PGCs), plays a combinatorial role with Prdm14 during PGC specification from postimplantation epiblast cells.