Table 1.

Isoforms of Pokeweed Antiviral Protein [24]. ND: Not Determined.

Isoform	Source	Number of Aminoacyl Residues	MW (kDa), Mature Protein	Activity (RC50)	References
PAP-I	Spring Leaves	262	29	1.5 nM Rat Liver Ribosomes; 4.7 nM E. coli Ribosomes	[70]
PAP-II	Early Summer Leaves	285	30	ND	[70]
PAP-III	Late Summer Leaves	285	30	ND	[86,88]
PAP-S1	Seeds	262	29	3.2 nM Rat Liver Ribosomes; 280 nM E. coli Ribosomes	[75,76]
PAP-S2	Seeds	262	29	3.6 nM Rat Liver Ribosomes; 1000 nM E. coli Ribosomes	[75,76]
α-PAP	Expressed in All Organs	261	28.9	1.3 nM Rat Liver Ribosomes; 25 nM E. coli Ribosomes	[76]
PAP-R	Roots	271	29.8	ND	[89]
PAP-H	Hairy Roots	268	29.5	ND	[90]
PAP-Culture	Tissue Culture	262	29	ND	[91]