題組內容

1. A scientist uses the yeast expression system to over-express one recombinant protein, and which is also an enzyme. Based on the enzymatic activity of the recombinant protein, the scientist is able to purify the protein and makes the purification table. 

(6) When the protein is resolved on the Native-PAGE followed by CBR staining, three protein bands are observed on the gel. Please explain these three protein bands.