Sequence alignment between 3duh(D) and UniProt seq Q9NPF7 (IL23A_HUMAN):

Q9NPF7 (IL23A_HUMAN): Interleukin-23 subunit alpha from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180            
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MLGSRAVMLLLLLPWTAQGRAVPGGSSPAWTQCQQLSQKLCTLAWSAHPLVGHMDLREEGDEETTNDVPHIQCGDGCDPQGLRDNSQFCLQRIHQGLIFYEKLLGSDIFTGEPSLLPDSPVGQLHASLLGLSQLLQPEGHHWETQQIPSLSPSQPWQRLLLRFKILRSLQAFVAVAARVFAHGAATLSP---
         ..................X............................XXXXXXXXXXXXXXXXXX.............................................XXXXX...........................XXXXXXXXXXXXXX....................................
PDB seq: ------------------LRAVPGGSSPAWTQCQQLSQKLCTLAWSA------------------NDVPHIQCGDGCDPQGLRDNSQFCLQRIHQGLIFYEKLLGSDIFT-----LPDSPVGQLHASLLGLSQLLQPEGHHW--------------QRLLLRFKILRSLQAFVAVAARVFAHGAATLSPHHH
                           +---------+---------+--------                  ---+---------+---------+---------+---------+-     ---+---------+---------+---              --+---------+---------+---------+---
                           0        10        20                            50        60        70        80        90       100       110       120                 140       150       160       170