Table 3. Composition of
in vitro
buffer solution
Item
g/L
Buffer solution A
KH
2
PO
4
10.0
MgSO
4
·7H
2
O
0.5
NaCl
0.5
CaCl
2
·2H
2
O
0.1
Urea (regent grade)
0.5
Buffer solution B
Na
2
CO
3
15.0
Na
2
S·9H
2
O
1.0