Table 3.

Average and minimal-maximal range of molecular weight and absolute value of charge for three sets of plastid proteins

Set of proteins	Number	Molecular weight (kDa)	Absolute value of charge
Nuclear-encoded proteins targeted to Paulinella endosymbiontsa	28	7.6 (4.4–9.1)	1.0 (0.0–5.5)
Proteins encoded in Paulinella endosymbiont genomes	867	30.3 (3.5–151.2)	5.5 (0.0–63.0)
Nuclear-encoded proteins targeted to primary plastids by means of pTP	1,762	41.1 (10.0–202.1)	5.0 (0.0–72.5)

^aWe included all TIS variants listed in Table 1 with the exception of one PsaK protein whose sequence was incomplete. In the case of PsaE from FK01 strain the sequence without the potential signal peptide and the sequence of mature protein were included because it is probable that its signal peptide is cleaved in the lumen of the endoplasmic reticulum and only the mature protein reaches the endosymbiont