Related Experiment Video
Updated: Jan 24, 2026

Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
Published on: January 22, 2019
Strophasterols E and F: Rearranged ergostane-type sterols from Pleurotus eryngii
Takashi Kikuchi1, Maya Isobe1, Sawako Uno1
1Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan.
Abstract:
Strophasterols E (1) and F (2) were isolated from the fruiting bodies of Pleurotus eryngii, together with four new ergostane-type sterols (3-6). Single-crystal X-ray diffraction analysis performed on the tris-p-bromobenzoate derivatives of compounds 1 and 2 allowed these two compounds to be identified as the structurally rare (22S,23R)- and (22S,23S)-5α,6α-epoxy-3β,7β,23-trihydroxy-15(14 → 22)-abeo-ergost-8-en-14-one, respectively. The inhibitory effects on nitric oxide production of the six new steroids thus isolated from the fruiting bodies of P. eryngii were also evaluated.
Related Concept Videos
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
[3,3] Sigmatropic Rearrangement of Allyl Vinyl Ethers: Claisen Rearrangement
Preparation of Diols and Pinacol Rearrangement
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

