Given the task definition and input, reply with output. Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

How or rather when an activated killer T cell finds cells where the MHC 1 receptor has specific antigens, it releases cytotoxins such as what?
When an activated killer T cell finds cells where the MHC 1 receptor has specific antigens, it releases cytotoxins such as what?