Friedelin Synthase from Maytenus ilicifolia: Leucine 482 Plays an Essential Role in the Production of the Most Rearranged Pentacyclic Triterpene.

Among the biologically active triterpenes, friedelin has the most-rearranged structure produced by the oxidosqualene cyclases and is the only one containing a cetonic group. In this study, we cloned and functionally characterized friedelin synthase and one cycloartenol synthase from Maytenus ilicifolia (Celastraceae). The complete coding sequences of these 2 genes were cloned from leaf mRNA, and their functions were characterized by heterologous expression in yeast.

[Advances in the Brazilian norm for commercialization of infant foods].

Objective: To assess the advances in the Brazilian norm for commercialization of infant foods from 1988 to 2002, comparing the different texts with each other and with the International Code of Marketing of Breast-Milk Substitutes.

Methods: This was a descriptive study based on data collected from documents, reports, ordinances and resolutions from the Brazilian Ministry of Health. The versions utilized in the comparison were from 1992 and 2002.