P R O T E I N S I N D E V E L O P M E N T
075H
0*50
025
4
5
6
mgN per cent
FIG. 2. Absorption values (E) as a function of N determined by the Parnas method.
Arbacia lixula values were read at 280 m/x; Rana esculenta values were read at 275 m/x.
I-OH
0-8H
% V
0-6 \ k\
,,..v
0-280 -=
M*
0
"
F 64 Bl C
rlT-1
rt
U 16
Bg Bm
Pr
- i — 1
P I
h70
Uo
IbO
i-40
M0
0
o
to
U
Z
ja
3
o
R
FIG. 3. Solubility of proteins of Arbacia lixula at different developmental stages: E 0 in
Weber and Edsall solution (0-5 g in 100 ml diluted 1 : 10), E 9 0 in Weber and Edsall solution with 90% ammonium sulphate saturation (last tube of Fig. 1). The two curves
represent absorption values (E). The third curve represents soluble N. U : unfertilized
egg; F : fertilized; 16, 64: numbers of blastomeres; Bg: young blastula; Bl: swimming
blastula; Bm: mesenchyme blastula; G: gast ru la; Pr: prism; PI: pluteus; R : adult
sea urchin.
075H
0*50
025
4
5
6
mgN per cent
FIG. 2. Absorption values (E) as a function of N determined by the Parnas method.
Arbacia lixula values were read at 280 m/x; Rana esculenta values were read at 275 m/x.
I-OH
0-8H
% V
0-6 \ k\
,,..v
0-280 -=
M*
0
"
F 64 Bl C
rlT-1
rt
U 16
Bg Bm
Pr
- i — 1
P I
h70
Uo
IbO
i-40
M0
0
o
to
U
Z
ja
3
o
R
FIG. 3. Solubility of proteins of Arbacia lixula at different developmental stages: E 0 in
Weber and Edsall solution (0-5 g in 100 ml diluted 1 : 10), E 9 0 in Weber and Edsall solution with 90% ammonium sulphate saturation (last tube of Fig. 1). The two curves
represent absorption values (E). The third curve represents soluble N. U : unfertilized
egg; F : fertilized; 16, 64: numbers of blastomeres; Bg: young blastula; Bl: swimming
blastula; Bm: mesenchyme blastula; G: gast ru la; Pr: prism; PI: pluteus; R : adult
sea urchin.