High-throughput identification of heavy metal binding proteins from the byssus of chinese green mussel (<i>Perna viridis</i>) by combination of transcriptome and proteome sequencing - Fig 3

Content and distribution of histidine (H) and cysteine (C) residues in the byssal protein sequences of P. viridis. The x-axis represents the content of histidine (red) and cysteine (blue) in each protein. The y-axis represents the number of proteins.