Sequence alignment between 1hfe(S) and UniProt seq P07603 (PHFS_DESVH):

P07603 (PHFS_DESVH): Periplasmic [Fe] hydrogenase small subunit from Nitratidesulfovibrio vulgaris (strain ATCC 29579 / DSM 644 / CCUG 34227 / NCIMB 8303 / VKM B-1760 / Hildenborough)
                 10        20        30        40        50        60        70        80        90       100       110       120   
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MQIASITRRGFLKVACVTTGAALIGIRMTGKAVAAVKQIKDYMLDRINGVYGADAKFPVRASQDNTQVKALYKSYLEKPLGHKSHDLLHTHWFDKSKGVKELTTAGKLPNPRASEFEGPYPYE
PDB seq: -----------------------------------VKQIKDYMLDRINGVYGADAKFPVRASQDNTQVKALYKSYLEKPLGHKSHDLLHTHWFDKSKGVKELTTAGKLPNPRASEFEGPYPYE
                                            ----+---------+---------+---------+---------+---------+---------+---------+---------+---
                                               40        50        60        70        80        90       100       110       120