Note, I have access but this is not my field. I just asked ChatGPT your question after have it read the paper. This is what the response was:

Yes, the paper provides the 12-mer amino acid sequence of BRP: THRILRRLFNLC .

Regarding post-translational modifications, the BRP peptide was synthesized with a C-terminal amidation, which was critical for its bioactivity. The non-amidated version of BRP was inactive in vitro . Additionally, the paper mentions that the C-terminal cysteine (C12) was synthesized as a free thiol .

So, BRP is not just a simple peptide—it has a key post-translational modification (C-terminal amidation) that influences its function.