In the realm of molecular biology, the term "intrasubunit" refers to interactions or phenomena occurring within a single subunit of a larger complex. While there may not be direct synonyms for this specific word, certain phrases or descriptions could be used as alternatives to convey a similar meaning. One could refer to "within-subunit" processes, indicating activities taking place inside a particular subunit. Similarly, you may use terms like "internal subunit" or "subunit-specific" to describe events confined within a subunit. These alternative expressions help in elucidating the concept of molecular interactions within discrete components, highlighting the intricacies and dynamics within the subunit itself.