Acts as an activator of Rop GTPases by exchanging GDP with GTP. Stimulates Rop1 to control polarized pollen tube growth.
Source:http://purl.uniprot.org/SHA-384/DEAF2491214A5FC02B0196087B9B2BEF417D9112B1EDC42DDABC0EAD13E2D84A93FE765EA7D0936C6817A92C8E584601
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