Sequence alignment between 1spf(A) and UniProt seq P15785 (PSPC_PIG):

P15785 (PSPC_PIG): Pulmonary surfactant-associated protein C from Sus scrofa 
                 10        20        30     
         ---------+---------+---------+-----
UniProt: LRIPCCPVNLKRLLVVVVVVVLVVVVIVGALLMGL
PDB seq: LRIPCCPVNLKRLLVVVVVVVLVVVVIVGALLMGL
         ---------+---------+---------+-----
                 10        20        30