TABLE 1.

Heme compounds from A. lipoferum and control membrane preparations

Heme	Organism	Mean retention time (min) ± SDa
D	E. coli, A. lipoferum	17.1 ± 0.6 (15)
B	E. coli, B. subtilis, A. lipoferum	21.1 ± 0.3 (18)
R1	A. lipoferum	24.8 ± 0.3 (5)
A	B. subtilis, A. lipoferum	29.9 ± 0.4 (14)
O	E. coli	31.9 ± 0.3 (3)
R2	A. lipoferum	34.7 ± 0.2 (3)
R3	A. lipoferum	36.4 ± 0.4 (11)

^aThe results shown are the mean ± standard deviation as calculated from several (number in parentheses) independent experiments.