TABLE 3.

Relationship between ABT₅₀ to purified antigens and the relative affinity of the serum antibody

Purified antigen	Relationship between relative affinity and ABT50a	No. of patients examined
LAMb	Linear	6
	No relationship	2
16 kDa	Linear	3
	No relationship	12

^aA linear relationship indicates no change in affinity of the antibody.

^bLAM, lipoarabinomannan.