You will be shown biomedical passages and your task is to the answer the provided question. Provide a concise and accurate response and do not include any additional text in the response other than the answer.

Question: Which is the protein encoded by the human gene GRIK?

Context: GRIK = glutamate receptor, ionotropic, kainate
To this end, the effects of chronic ethanol self-administration on glutamate receptor ionotropic AMPA (GRIA) subunit variant and kainate (GRIK)
glutamate receptor ionotropic kainate