Sequence alignment between 3tvh(2) and UniProt seq P60492 (RL21_THET8):

P60492 (RL21_THET8): 50S ribosomal protein L21 from Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)
                 10        20        30        40        50        60        70        80        90       100 
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: MFAIVKTGGKQYRVEPGLKLRVEKLDAEPGATVELPVLLLGGEKTVVGTPVVEGASVVAEVLGHGRGKKILVSKFKAKVQYRRKKGHRQPYTELLIKEIRG
PDB seq: MFAIVKTGGKQYRVEPGLKLRVEKLDAEPGATVELPVLLLGGEKTVVGTPVVEGASVVAEVLGHGRGKKILVSKFKAKVQYRRKKGHRQPYTELLIKEIRG
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-
                 10        20        30        40        50        60        70        80        90       100