Substrates of the ATP-dependent Secpathway contain a Sec-type thylakoid targeting signal, interact with the stromal SecA protein, and are translocated in
an unfolded state through the Sec translocon. The DpH-dependent twinarginine
translocation (Tat) pathway accomplishes the transport of fully
folded precursors whose lumenal transit peptide carries a characteristic
twin-arginine motif preceding the hydrophobic core