ab
p = 0.098
t12
40
Z
0
O3
-,x
E 30
U)
>
X
0
E
Z20
x
(L
*AL
DR
A R-AL
z
0
M- 30
U)
0
E
- 20
a.
Figure 4-2. Glutathione peroxidase (GPX) specific activity and antioxidant potential (AP;
calculated as nmoles of copper reducing equivalents, CRE) in Chelonia mydas liver
homogenate at five weeks (ts) and twelve weeks (t12). For graphs on the left, GPX
activity and total AP were normalized to total protein concentration as determined by
Bradford assay. For graphs on the right, GPX activity and total AP were normalized
to tissue DNA content as reported in Chapter 3 for t12 turtles. Each point represents
mean + standard error. Treatment groups and data analysis are the same as in Table
4-1. Sample sizes for GPX activities are the same as in Figure 4-1. Sample sizes for
AP are n = 9 for t5 turtles and n = 7, 8, and 8 for t12 AL, R, and R-AL turtles,
respectively. Letters (a and b) indicate statistically significant differences (p < 0.05)
among treatment groups within sampling periods.