Table 1.

Source of inserted fragment of expression vectors.

Number	Plasmid	Recom binant antigen	Insertion fragment
1	pC149/wt	C149/wt	-
2	pC149/mut	C149/mut	-
3	pC149/21-47*1	CI	Single copy of preS1 (21-47)
4	pC149/21-47*2	CII	Two copies of preS1 (21-47)
5	pC149/21-47*3	CIII	Three copies of preS1 (21-47)
6	pC149/21-47*4	CIV	Four copies of preS1 (21-47)
7	pC149/21-47*5	CV	Five copies of preS1 (21-47)
8	pC149/21-47*6	CVI	Six copies of preS1 (21-47)