PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11161055-1 2001 We have found that chromosaponin I (CSI), a gamma-pyronyl-triterpenoid saponin isolated from pea (Pisum sativum L. cv Alaska), specifically interacts with AUX1 protein in regulating the gravitropic response of Arabidopsis roots. Saponins 25-32 Transmembrane amino acid transporter family protein Arabidopsis thaliana 155-159