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. 2016 Jun 1;13:132. doi: 10.1186/s12974-016-0591-x

Fig. 1.

Fig. 1

Schematic representation of the potential cross-reactivity of anti-Met-enkephalin and anti-β-endorphin polyclonal IgG antibodies. The amino acid sequence of Met-enkephalin (five amino acids corresponding to only one epitope, gray box) is identical to the first five amino acids of the β-endorphin and may be recognized by immune serum IgG specifically raised against Met-enkephalin (Inline graphic) or β-endorphin (Inline graphic)