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