system
Given the following post, respond as if you're commenting on Reddit:
human
Why do pineapples contain Bromelain?

I've seen a lot of articles talking about this meat digesting enzyme, bromelain, that the pineapple is unique for, but none of those articles explain why would a fruit need to digest meat.
gpt
They are cysteine proteases, not specific to digesting animal protein. They have a multitude of uses in plants similar to those in animals e.g.. senescence regulation but also appear to be involved in seed development.