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. 2008 Jan 9;3(1):e1413. doi: 10.1371/journal.pone.0001413

Table 1. Kinetic constants of EndoS binding to immobilized human IgG1–IgG4.

	EndoS (E235Q)	EndoS (E235Q)	EndoS (E235Q)	EndoS
	k_a (×10⁴/M/s)	k_d (×10⁻³/s)	K_D (×10⁻⁷M)
IgG1	4.2	17.6	4.2	nb^a
IgG2	1.2	2.5	2.1	nb
IgG3	10.7	8.9	0.83	nb
IgG4	1.5	2.0	1.4	nb
IgG1–4^b	nb	nb	nb	nb

^a

nb = no binding

^b

IgG1–4 hydrolyzed by EndoS