Given the task definition and input, reply with output. In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

However , the lack of crossed recognition of cox2 promoters in wheat and potato is not a general situation since the A . thaliana cox2 gene is expressed and spliced when introduced into maize mitochondria , indicating that the Arabidopsis gene shares some signals with maize cox2 promoter that are sufficient for transcription ( 18 ) .
A . thaliana