Abstract Macroscale superlubricity has attracted increasing attention owing to its high significance in engineering and economics. We report the of materials by addition partially oxidized black phosphorus (oBP) an oleic acid (OA) oil environment. The oxides produced active oxidation exhibit lower friction quick deposition performance compared BP particles. H-bond (-COOH⋯O-P, or -COOH⋯O=P) form...

The organic matrix in forming enamel consists largely of the amelogenin protein self-assembled into nanospheres that are necessary to guide the formation of the unusually long and highly ordered hydroxyapatite (HAP) crystallites that constitute enamel. Despite its ability to direct crystal growth, the interaction of the amelogenin protein with HAP is unknown. However, the demonstration of growt...

Sec2p is required for the polarized transport of secretory vesicles in S. cerevisiae. The Sec2p NH(2) terminus encodes an exchange factor for the Rab protein Sec4p. Sec2p associates with vesicles and in Sec2p COOH-terminal mutants Sec4p and vesicles no longer accumulate at bud tips. Thus, the Sec2p COOH terminus functions in targeting vesicles, however, the mechanism of function is unknown. We ...

Two cDNA clones containing coding information for cecropin B from the Cecropia moth (Hyalophora cecropia) were identified by means of a synthetic probe. Sequencing of the two inserts showed that cecropin B is processed from a 62-amino acid residue precursor molecule including a 26-residue leader peptide and a COOH-terminal glycine residue. The latter presumably donates the nitrogen of the amide...

It is generally recognized that nascent proteins destined to be processed to a phosphatidylinositol-glycan (PI-G)-anchored membrane form contain a hydrophobic signal peptide at both their NH2 and COOH termini. In previous studies we showed that rough microsomal membranes (RM) prepared from CHO cells can carry out COOH-terminal processing. We have now investigated RM prepared from many additiona...

A lead-free perovskite/MOF catalyst shows a high CO selectivity of 99.5% for photocatalytic 2 reduction, stemming from efficient charge separation, formation *COOH intermediates, and prompt desorptionof the catalyst.

The five KCNE genes encode a family of type I transmembrane peptides that assemble with KCNQ1 and other voltage-gated K(+) channels, resulting in potassium conducting complexes with varied channel-gating properties. It has been recently proposed that a triplet of amino acids within the transmembrane domain of KCNE1 and KCNE3 confers modulation specificity to the peptide, since swapping of these...

The COOH terminus of decay accelerating factor (DAF) contains a signal that directs attachment of a glycophosphatidylinositol (GPI) membrane anchor in a process involving proteolytic removal of 17-31 COOH-terminal residues. Previous work suggested that two elements are required for anchor addition, a COOH-terminal hydrophobic domain (the GPI signal) and an element located NH2-terminal to it, po...

A new high-throughput liquid chromatography / tandem mass spectrometry (LC-MS/MS) method for the quantification of Δ-tetrahydrocannabinol (THC) in suspect plant material and of its principal metabolite, 11-nor-9carboxy-Δ-tetrahydrocannabinol (THC-COOH), in human urine was developed and validated. The separation was performed on a Zorbax SB-C18 column under isocratic conditions using a mixture o...

Hepatocellular carcinoma (HCC) is especially prevalent in Hong Kong due to prevalent hepatitis B virus (HBV) infection. HBV-associated HCC has a male predominance, with a male-to-female ratio of about 4-5:1. This is in contrast to HCV-associated HCC that has a male-to-female ratio of 1.5-2:1. HBV is a partially double-stranded DNA virus containing four overlapping open reading frames. Among the...