Friday, 18 April 2008

Regeneration test of three rice varieties


Image Title: Regeneration test of three rice varieties. (a) A japonica variety, "Nipponbare," that has a high-regeneration frequency. (b) A japonica variety, "Koshihikari," that has a low-regeneration frequency. (c) An indica variety, "Kasalath," that exhibits a high-regeneration frequency.

Taken from: A protocol for Agrobacterium-mediated transformation in rice

Sunday, 13 April 2008

Transformation of Agrobacterium

Box: Transformation of Agrobacterium

From: Rapid, transient expression of fluorescent fusion proteins in tobacco plants and generation of stably transformed plants

Published in: Nature Protocols

YEB medium Yeast extract (1.0 g l-1), beef extract (5.0 g l-1), peptone (5.0 g l-1), sucrose (5.0 g l-1), MgSO47H2O (0.5 g l-1), pH 7.0. Also include the proper antibiotic resistance selection drug for the FP fusion construct carried by these bacteria.

The Boxed protocol is for a reagent used in the Nature Protocol. It is based on the method described in Storage of competent cells for Agrobacterium transformation.

Thursday, 10 April 2008

Quantifying pollen viability in Arabidopsis

Box: Quantifying pollen viability

From: Fluorescent Arabidopsis tetrads: a visual assay for quickly developing large crossover and crossover interference data sets

Published in: Nature Protocols

The PGM solution used in the Boxed protocol is prepared as follows:
To 950 ml H2O, add 170 g sucrose (17% wt/vol), 2 ml 1 M CaCl2 (2 mM), 3.25 ml 0.5 M boric acid (1.625 mM) and 100 mul Triton-X (0.1% vol/vol).

Deriving Linkage Distance and Gene Order From Three-Point Crosses contains some background information about the ABC genotype reference...

Tuesday, 8 April 2008

BIO-RAD protein assay

Box: BIO-RAD protein assay

Taken From: Southwestern blotting in investigating transcriptional regulation

Published in: Nature Protocols

This is a short protocol for determining protein concentrations.
The main protocol is open access during 2008 being part of the sample issue.

Monday, 7 April 2008

Preparation of the per-O-trimethylsilylated glucoside 1a and 1b

Box: Preparation of the per-O-trimethylsilylated glucoside 1a and 1b

Taken from: Regioselective one-pot protection of glucose

Published in: Nature Protocols

Glucosides 1a and 1b, shown in Figure 1 of the protocol, are the starting materials for a series of reactions to protect different combinations of hydroxyl groups in the glucose molecule.