English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Isotope dilution (ID) of intracellular amino acids In bacterial assemblages in the subarctic Paclflc was measured in order to examine the relat~onshlp between dissolved free anlino aclds (DFAA) and other sources of amino acids for protein synthesis When 3 ~ a n ~ i n o acids were added at trace amounts to <0.8 pm filtrates, ID of single amino aclds vaned greatly. Isotope dilutlon of senne, glyclne, threonine, arginlne, alanine, and tyrosine was 1to 4-fold, indicating that 25 to 100 O/o of bacterlal biosynthetlc requirements was met by uptake of these amlno acids Vallne, phenylalanine, isoleucine, and leucine exhibited 8to 50-fold ID Indicating that only a minor fractlon of bacterlal biosynthetic requirements was met by uptake of these amlno acids. These results were consistent wlth measurements of the fractlon of bacterlal biomass productlon supported by uptake of DFAA (8 to 42 '%). Intracellular Isotope dllutlon appeared to be Inversely related to the extracellular concentration of the respective DFAA Glutamate ID was always hlgh (13to 95-fold) and independent of its concentration. Thls high ID was probably due to substantial ammonium uptake, indicating that In addition to DFAA, ammonium was an Important N-source for amlno acld de novo synthesis and thus for proteln productlon.

Isotope dilution of intracellular amino acids as a tracer of carbon and nitrogen sources of marine planktonic bacteria