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