Ronin is expressed primarily during the earliest stages of murine embryonic development, and its deficiency in mice produces periimplantational lethality and defects in the inner cell mass.

• 磺胺吡啶在鼠胚胎发育的最早的阶段就开始表达，并且在小鼠中一旦它缺乏，就会造成内细胞团的缺陷和围产期的死亡.