FREQUENCY (percent)
AMERICAN WHITES
N = 300
=
a
L
%
>
c
=
w
2
oO
Le
a
re
LOG (mgm. B-amino-isedutyric adit /mgm, creatinine }
Fig. 1.
Frequency distributions of urinary excretion-rates of
f-amino-tsobutytic acid of Marshal} Islanders (Rongelap) and
U.S.A, Whiter
of the individuals on whom determination of 8-aminowsobutyric acid had been made were supplied to us.
The availability of these data gave us an opportunity
to determine if these low levels of radioactivity had
anyeffect on the excretion of 8-amino-/sobutyric acid.
3