>3D_helix;100
            protein_name:photosystem I F subunit* (Synechococcus elongatus)
            file_name:PS_I_PsaF.txt
            entry_date:6jul01
            refman_number:19835,16396,19598,16394,13836,20928
            endnote_number:
            author:Jordan,P., Fromme,P., Witt,H.T., Klukas,O., Saenger,W., Krauss,N. (2001) [Three-dimensional structure of cyanobacterial photosystem I at 2.5 Å resolution] {Nature, 411, 909-917}
            remarks:*Only helix A is transmembrane. Helix B does not cross the membrane, but is buried in it with a kink so that it enters and leaves from the same side (stromal) of the membrane. Stroma = in. Sequence is the processed sequence from Swiss-Prot (23 AA signal sequence removed).
            pir_number:
            Swiss_Prot_entry:PSAF_SYNEL
            Swiss_Prot_number:P0A401
            Swiss_Prot_gene:PSAF,TLR2411
            Swiss_Prot_name:Photosystem I reaction centre subunit III [Precursor]
            PDB_title:PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT III
            PDB_Identifier:1JB0
            N_terminal:out
            number_tmsegs:2
            tm_segments:A.64,89;B.104,126
            sequence:DVAGLVPCKDSPAFQKRAAAAVNTTADPASGQKRFERYSQALCGEDGLPHLVVDGRLSRAGDFLIPSVLFLYIAGWIGWVGRAYLIAVRNSGEANEKEIIIDVPLAIKCMLTGFAWPLAALKELASGELTAKDNEITVSPR*