Table 1. Statistical summary of the three types of effector proteins collected from the literature.

Type	Reference	Number of entries in the reference	Number of entries included in SecretEPDB
T3SE	Dong, X. et al.21; Wang, Y. et al.28	150	150
	Arnold, R. et al.20	100	94
	Tay, D. M. et al.41	504	334
	Yang, X. et al.14	283	260
	Dong, X. et al.32	1215	704
T4SE	Bi, D. et al.31	239	239
	Zou, L. et al.29	340	340
	Wang, Y. et al.42	347	347
	Lifshitz, Z. et al.43	290	290
T6SE	Li, J. et al.33	107	88
	Salomon, D. et al.24	6	6
	Russell, A. et al.44	50	40
	Russell, A. et al.45	61	38