4633496 PE36_05108 chi 4630817 PE36_19395 nagE 4634748 PE36_18600 ptsH 4634749 PE36_18605 ptsI 4634750 PE36_18610 crr 4630818 PE36_19400 nagB 4630819 PE36_19405 nagA 4630820 PE36_19410 nagC