Fig. 1.

Relaxed stereodiagram of human FGF-1 (Blaber et al. 1996) showing the location of the β8/β9 turn region and the 90–94 β-hairpin (dark gray). The view is down the pseudo threefold axis of symmetry present in the β-trefoil architecture. Region 90–94 is related to the N- and C-termini by this internal symmetry.