間葉 かんよう けい細胞 さいぼうではありませんでした
kan'yōkeisaibōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 間葉系細胞

1. Was not mesenchymal stem cell.; Was not a mesenchymal stem cell.

Past/Perfective
Negative
Polite
Formal Register