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