Fig. 2

a Nucleotide sequence of the gene identified for FNR of Gracilaria chilensis. Nucleotides 1–135 (bold letters) codify for a chloroplastide transit signal. b Translated sequence of the G. ch mature protein, from amino acid 1. A sequence alignment with FNR from Zea mays, Pyropia yezoensis, Chondrus crispus, Synechococcus sp. and Anabaena sp.* is also shown. In Synechococcus, the sequence for a PBS binding third domain is shown (residues – 1 to − 80). The NADP and FAD binding domains are indicated by arrows, the conserved residues for the binding of co-factor and substrate are also shown in blue squares and red squares for FAD and NADP binding residues respectively.Amino acid residues involved in the interaction with ferredoxin are also shown. *The third domain for Anabaena sp. is not shown for the clarity of the alignment. Only the common two domains present in the structural complex (1ewy) are shown