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Fig. 5. Arabidopsis PIR and human SRA1 have similar RHO-family GTPase
binding activities. (A) PIR and human SRA1 bind interchangeably to
plant and animal RHO-family GTPases in the yeast two-hybrid assay. The bait
and prey plasmids co-transformed into yeast are listed to the left of the
corresponding patches and ß-galactosidase assay results. (B) PIR
shows nucleotide-selectivity for interaction with ROP2 in yeast
two-hybrid system. The bait and prey plasmids co-transformed into yeast are
described to the left as in A.