Two higher molecular weight forms related to ferritin are synthesizedin vitro by RNA from developing cotyledons and leaves ofPhaseolus vulgaris

Abstract

Using RNA from developing cotyledons and leaves of bean two products were synthesizedin vitro, with Mr 31000 and 31500 which are antigenically related to the subunit of phytoferritin (Mr 26500). The relative abundance of the two products is dependent on the type of tissue from which the RNA was derived. Evidence is presented for the assumption that both products are precursors of the phytoferritin subunit. The hypothesis is put forward that different transit sequences direct the phytoferritin subunits to different cell organelles.

Ferritin accumulation and degradation in different organs of pea (Pisum sativum) during development

“…The non-detectability of dispersed ferritin molecules and those with small iron cores limits the information from these studies. The only quantitative data available about ferritin protein content in plants are restricted to bean leaves (van der Mark et al, 1981(van der Mark et al, , 1982(van der Mark et al, , 1983a and soybean cell suspensions (Proudhon et al, 1989). In both systems the environmental effect of iron on the induction of ferritin synthesis has been studied by using immunological methods.…”