Genome-wide identification and expression analysis of SBP-box gene family in Sorghum bicolor L.

SQUAMOSA PROMOTER BINDING PROTEIN-box (SBP-box) family genes encoding plant-specific transcription factors are involved in many aspects of crop genetic improvement such as yield, plant-type and stress-resistance. The SBP-box gene family have important practical applications. In this study, 18 SBP-box genes were identified from the reference genome of sorghum (Sorghum bicolor L.

Highly enantioselective dimerization of alpha,beta-enones catalyzed by a rigid quaternary ammonium salt.

[reaction: see text] The chiral quaternary ammonium salt 1 served as a phase-transfer catalyst for the enantioselective dimerization of alpha,beta-enones, providing a route for the asymmetric syntheses of chiral 1,5-dicarbonyl compounds and alpha-alkylated gamma-keto acids.

[Sequence variation of the chloroplast gene ndh D region in cytoplasmic male sterile sorghum].

A fragment SAAU-02(700) was amplified specifically from total DNA of seven sorghun varieties with male-fertile cytoplasm (N-cytoplasm). PCR assays indicated that it was amplified from chloroplast (cp) DNA. Sequence analysis revealed this newly cloned fragment contained a portion of chloroplast gene psa C (88 bp) and part of ndh D gene (192 bp).

re- and si-Face-Selective Nitroaldol Reactions Catalyzed by a Rigid Chiral Quaternary Ammonium Salt: A Highly Stereoselective Synthesis of the HIV Protease Inhibitor Amprenavir (Vertex 478).

Either amprenavir (1) or its C(2) diastereomer can be synthesized in a simple way by the use of a nitroaldol reaction carried out in the presence of one or the other of the two ammonium ions 2. The 1,3-diamino-2-hydroxypropyl structural element of 1 is also found in many other peptidomimetics and HIV protease inhibitors. Described here is a new strategy for possible application to direct and stereocontrolled synthesis of such compounds.