Use consistent tags for identical fields SQ_data = (Martel.Str(" ") + Std.sequence(Martel.UntilEol()) + Martel.AnyEol()) sequence = Std.sequence_block(SQ + Martel.Rep(SQ_data), {"alphabet": "iupac-ambiguous-protein"})
SQ_data = (Martel.Str(" ") + Std.sequence(Martel.UntilEol()) + Martel.AnyEol()) sequence = Std.sequence_block(SQ + Martel.Rep(SQ_data), {"alphabet": "iupac-ambiguous-protein"})