Size-dependent heparin-induced
dimerization of Nrp1. SEC-MALS chromatogram
of Nrp1 a1a2b1b2 and A, heparin hexasaccharide (dp6); B, heparin octasaccharide
(dp8); C, heparin decasaccharide (dp10); D, heparin dodecasaccharide
(dp12); E, heparin tetradecasaccharide (dp14); F, heparin hexadecasaccharide
(dp16); G, heparin octadecasaccharide (dp18); and H, heparin icosasaccharide
(dp20). SEC-MALS chromatogram of I, R513A + heparin octadecasaccharide
(dp18); J, K514A + heparin octadecasaccharide (dp18); K, R513A,K514A
+ heparin octadecasaccharide (dp18); L, R513A + heparin icosasaccharide
(dp20); M, K514A + heparin icosasaccharide (dp20); N, R513A,K514A
+ heparin icosasaccharide (dp20); and O, a mix of heparin oligosaccharides
(dp20, dp14, dp8). Gray lines are protein only, and black lines are
protein incubated with oligosaccharide.