prolyl-seryl-glycyl-phenylalanyl-tyrosyl-leucyl-lysyl-leucyl-aspartyl-prolyl-arginyl-asparaginyl-phenylalanyl-asparagine C??? ??, ??, ??

prolyl-seryl-glycyl-phenylalanyl-tyrosyl-leucyl-lysyl-leucyl-aspartyl-prolyl-arginyl-asparaginyl-phenylalanyl-asparagine ?? ?? ? ???

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prolyl-seryl-glycyl-phenylalanyl-tyrosyl-leucyl-lysyl-leucyl-aspartyl-prolyl-arginyl-asparaginyl-phenylalanyl-asparagine ?? ??