Fig. 2From: Putative trehalose biosynthesis proteins function as differential floridoside-6-phosphate synthases to participate in the abiotic stress response in the red alga Pyropia haitanensisPhylogenetic analysis and structural evolution of TPS、TPS/TPP and GGPS proteins from different species. A NJ tree was constructed to show the phylogenetic relationships of the TPS、TPS/TPP and GGPS proteins using the functional-related full amino acid sequences from prokaryotes, red algae, diatoms, brown algae, fungi, green algae, plants, and animals. Their accession numbers are indicated in Additional file 3: Table S1. There were 1,000 bootstrap replicates. The red triangle shows PhTPS1–4. The functional domain in each sequence was retrieved using the Conserved Domain tool in NCBI and is marked by a superscriptBack to article page