Salicylate coordination in metal-protochelin complexes

BioMetals - Molybdenum (Mo) is an essential trace element for bacteria that is utilized in myriad metalloenzymes that directly couple to the biogeochemical cycling of nitrogen, sulfur, and carbon....     

Tubulin transport by IFT is upregulated during ciliary growth by a cilium-autonomous mechanism

The assembly of the axoneme, the structural scaffold of cilia and flagella, requires translocation of a vast quantity of tubulin into the growing cilium, but the mechanisms that regulate the targeting, quantity, and timing of tubulin transport are largely unknown. In Chlamydomonas, GFP-tagged α-tubulin enters cilia as an intraflagellar transport (IFT) cargo and by diffusion. IFT-based transport of GFP-tubulin is elevated in growing cilia and IFT trains carry more tubulin. Cells possessing both nongrowing and growing cilia selectively target GFP-tubulin into the latter. The preferential delivery of tubulin boosts the concentration of soluble tubulin in the matrix of growing versus steady-state cilia. Cilia length mutants show abnormal kinetics of tubulin transport. We propose that cells regulate the extent of occupancy of IFT trains by tubulin cargoes. During ciliary growth, IFT concentrates soluble tubulin in cilia and thereby promotes elongation of the axonemal microtubules.     

Nitroindoles as Universal Bases

Abstract

Nitroindoles behave as non-discriminatory bases when incorporated into oligodeoxynucleotides, without causing significant destabilisation of the duplex, and exhibit higher melting temperatures than 3-nitropyrrole. When 5-nitroindole and 3-nitropyrrole are incorporated into oligomers for use as primers for sequencing and the polymerase chain reaction, both give products but are not as effective as hypoxanthine.     

Beitrag zur Kenntniss der Flora von Bosnien

Ohne Zusammenfassung     

Ueber eine Vergrünung vonSinapis arvensis L. (form,dasycarpa Neilr.)

Ohne Zusammenfassung     

Ueber die Frucht vonEuchlaena luxurians Dur. et Aschs

Ohne Zusammenfassung     

Hymenomycetologisches

Ohne Zusammenfassung