Correction to: Characterization of a glucose tolerant β-glucosidase from Aspergillus unguis with high potential as a blend-in for biomass hydrolyzing enzyme cocktails.

In the original publication of the article, the affiliation of two co-authors Prajeesh Kooloth-Valappil and Meera Christopher was published incompletely. The correct affiliation of the authors should read " Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India".

Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S to 6S transition using one-color two-photon excitation.

We experimentally demonstrate a one-color two-photon transition from the 5S ground state to the 6S excited state in rubidium (Rb) vapor using a continuous wave laser at 993 nm. The Rb vapor contains both isotopes (Rb and Rb) in their natural abundances. The electric dipole-allowed transitions are characterized by varying the power and polarization of the excitation laser.

Conformational features of the AgrA-promoter interactions rationalize quorum-sensing triggered gene expression.

The intracellular trigger for the quorum sensing response mechanism in involves the phosphorylation of the response regulator AgrA by the membrane anchored histidine kinase AgrC. AgrA activates transcription from three promoter sequences (P1-P3). The promoter strength, conditional association of AgrA with these promoter elements and temporal delay in AgrA-mediated changes in gene expression contribute to the diversity of the quorum sensing response in different strains.