Table 1. Binding parameters of the interaction of CXCL4^47–70 and CXCL4L1^47–70 peptides with heparin immobilized on a BIAcore sensorchip.

Peptide	Association rate (Kon) (1/Ms)	Dissociation rate (Koff) (1/s)	Kd (Koff/Kon) (M)	Kd (M) at equilibrium
CXCL447–70	6.7 × 105	1.1 × 10−2	1.6 × 10−8	7.2 × 10−8
CXCL4L147–70	5.2 × 104	5.3 × 10−2	1.0 × 10−6	1.2 × 10−6

K_on and K_off of peptide/heparin interactions are shown. The K_d value was derived from the K_off/K_on ratio as well as by Scatchard plot analysis of the equilibrium binding data.