胚性 はいせい かん細胞 さいぼうじゃなかったです
haiseikansaibōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 胚性幹細胞

1. Was not embryonic stem cells.; Were not embryonic stem cells.

Past/Perfective
Negative
Polite
Casual Register