What's the plural form of plastocyanin? Here's the word you're looking for.
Answer
The noun plastocyanin can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be plastocyanin.
However, in more specific contexts, the plural form can also be plastocyanins e.g. in reference to various types of plastocyanins
or a collection of plastocyanins.
