Fig. 1.

SDS-PAGE of isolated membranes (ME), solubilized membranes from buds’ petals (PB), and from senescent flowers’ petals (PS). After solubilization, in both cases a single protein is extracted showing that, in buds, the amount of protein isolated is significantly higher than in senescent flowers. Equal amounts of solubilized membranes were loaded for both PB and PS samples. The membrane stock was obtained starting from the same amount of flowers (see Materials and methods). The molecular marker is indicated by M. The arrows show the protein band in the three samples.