RNA was extracted from sorted cell populations using a Direct-zol
RNA Kit. RNA quality and concentration were determined with a Qubit 4.0
fluorimeter (Thermo Fisher Scientific) with the RNA IQ Assay and a
Bioanalyzer (Agilent) with
Agilent RNA 6000 Pico Kit. Only samples with RIN
> 8 were proceed to reverse transcription. cDNA was synthesized with
the SMART-Seq® v4 Ultra Low Input RNA Kit following
manufacturer’s recommendations. Adapters were used as priming sites
for cDNA synthesis and downstream PCR to amplify the cDNA. Amplified cDNA
was purified using KAPA Pure Beads, and the yield and quality were
determined with a Qubit 4.0 fluorimeter using the dsDNA HS Assay Kit. The
DNA library was constructed using a KAPA HyperPlus Kit, following the
manufacturer’s recommendations. Sequencing was performed using a
HiSeq 4000 system (Illumina) at the Duke University Center for Genomic and
Computational Biology.
Yeh C.H., Finney J., Okada T., Kurosaki T, & Kelsoe G. (2022). Primary germinal center-resident T follicular helper cells are a physiologically distinct subset of CXCR5hiPD-1hi T follicular helper cells. Immunity, 55(2), 272-289.e7.