L-Leucine,N-[N-[N2-[N-[N2-[N2-[N-[1-[N2-[N2-(5-oxo-L-prolyl)-L-lysyl]-L-arginyl]-L-prolyl]-L-seryl]-L-glutaminyl]-L-arginyl]-L-seryl]-L-lysyl]-L-tyrosyl]-
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