13502
N - terminal sequencing indicated that pro - BMP - 2 was cleaved by FSAP at the canonical PC cleavage site , giving rise to mature BMP - 2 ( Arg ( 282 ) v Gln ( 283 ) ) , as well as in the N - terminal heparin binding region of mature BMP - 2 , generating a truncated mature BMP - 2 peptide ( Arg ( 289 ) v Lys ( 290 ) ) .
 Chemical: N; Chemical: Arg; Chemical: Gln; Chemical: N; Chemical: Arg; Chemical: Lys
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: N; Chemical: Arg; Chemical: Gln; Chemical: N; Chemical: Arg; Chemical: Lys