COX4NB GI:214010229 COX4 neighbor isoform 2 1 mpgvklttqa yckmvlhgak yphcavngll vaekqkprke hlplggpgah 50 51 htlfvdcipl fhgtlalapm levaltlids wckdhsyvia gyyqanervk 100 101 daspnqvaek vasriaegfs dtalim