電子 でんし伝達 でんたつ けいじゃありませんでした
denshidentatsukeijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 電子伝達系

1. Was not the electron transport chain.; Was not a part of the electron transport chain.

Past/Perfective
Negative
Polite
Terminal Form