増殖 ぞうしょく因子 いんしではありませんでした
zōshokuinshidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 増殖因子

1. Was not a growth factor.; Was not an accelerating factor.

Past/Perfective
Negative
Polite
Formal Register
Physiology