The molecule is a fifteen-membered polypeptide consisting of Asp, Ser, Gly, Glu, Gly, Asp, Phe, Leu, Ala, Glu, Gly, Gly, Gly, Val and Arg residues joined in sequence. It is a conjugate acid of a DSGEGDFLAEGGGVR(3-).
(4S)-4-[[2-[[(2S)-2-[[(2S)-2-amino-3-carboxypropanoyl]amino]-3-hydroxypropanoyl]amino]acetyl]amino]-5-[[2-[[(2S)-3-carboxy-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-4-carboxy-1-[[2-[[2-[[2-[[(2S)-1-[[(1S)-1-carboxy-4-(diaminomethylideneamino)butyl]amino]-3-methyl-1-oxobutan-2-yl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-5-oxopentanoic acid