Figure 12.

Measurement of the Endogenous Levels of Ins(1,4,5)P₃ and PtdIns(4,5)P₂ in the Wild Type and the fra3 Mutant.

The seedlings used were 10 d old, and the inflorescence stems were from 8-week-old plants. The levels of Ins(1,4,5)P₃ and PtdIns(4,5)P₂ are expressed as picomoles per gram of fresh weight.

(A) The level of Ins(1,4,5)P₃ in wild-type and fra3 seedlings.

(B) The level of PtdIns(4,5)P₂ in wild-type and fra3 seedlings.

(C) The level of Ins(1,4,5)P₃ in wild-type and fra3 stems.

(D) The level of PtdIns(4,5)P₂ in wild-type and fra3 stems.