Sequence alignment between 2a1c(A) and UniProt seq P60243 (CSP1_STRR6):

P60243 (CSP1_STRR6): Competence-stimulating peptide type 1 from Streptococcus pneumoniae (strain ATCC BAA-255 / R6) 
                 10        20        30        40 
         ---------+---------+---------+---------+-
UniProt: MKNTVKLEQFVALKEKDLQKIKGGEMRLSKFFRDFILQRKK
PDB seq: ------------------------EMRLSKFFRDFILQRKK
                                 ---------+-------
                                         10