background image
MbO
2
MetMb
4 days
7 days
12 days
+ vitamin E
Schaeffer (1992)
160
140
120
100
80
60
40
20
0
p O2 m m Hg
Mb
MbO2
Met Mb

p urp le brow n

re d
%

o
f

t
o
t
a
l

p
i
g
m
e
n
t
100
80
60
40
20
0
(Ledward, 1970)