Fig. 4

Statistical analysis of basic pI proteins in chloroplast proteomes. A Principal component analysis (PCoA) of basic pI proteins from the chloroplast proteome of different taxonomic groups of plants. The analysis indicated that monocots and eudicots cluster together, suggesting a commonality in these groups’ pI of chloroplast proteins. In contrast, algae, protists, and bryophytes are located distantly from the monocot-eudicot cluster. B Pearson’s correlation analysis (p < 0.05) values of basic pI proteins in the chloroplast proteins of different taxonomic groups of plants. C Heat map of the correlation between basic pI proteins. The analysis indicated several positive correlations between basic pI proteins in the chloroplast proteomes of different taxonomic groups of plants