title: GSM7051767: CD34+ HSPCs, day 4 under cytokine treatment, mRNA-derived cDNA; Homo sapiens; OTHER
library_name: GSM7051767
library_construction_protocol: Mononuclear cells were isolated by Ficoll-Hypaque (GE Healthcare) density centrifugation, and CD34+ cells were purified by immunomagnetic sorting using the CD34 Microbead kit (Miltenyi) and the AutoMACS Pro Separator (Miltenyi). Library was prepared using Chromium Single Cell 3ʹ v2 protocol (10x Genomics). Cellular mRNA and antibody-derived oligos were reverse-transcribed and indexed with a shared cellular barcode. Indexed cDNAs were then pooled and amplified by PCR according to the Chromium Single Cell 3' v2 protocol (10x Genomics) and with specific primers amplifying the antibody-derived tags. SPRI bead size selection was performed in order to separate both the mRNA-derived cDNA (>300bp) and the antibody-derived tagged cDNAs (180bp). For the mRNA derived cDNA library preparation, we further proceeded according to the manufacturer's instructions for Single Cell 3' v2 protocol (10x Genomics). For antibody-derived tagged library, we used the KAPA HiFI HotStart Library Amplification Kit (Roche) with the following primers and amplification program: -CITE-seq library: amplification was performed at 95°C for 3' followed by ten cycles at 95°C f¬¬or 20''; 60°C for 30''; 72°C for 20'' and final elongation 72°C for 5' with 5'-CAAGCAGAAGACGGCATACGAGATCGTGATGTGACTGGAGTTCCTTGGCACCCGAGAATTCCA-3' Small RNA RPI1 primer as i7 primer (Illumina). The following 5'- AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACGCTC-3' SI-PCR primer as i5 primer (Illumina) was used for both CITE-seq library amplification. Following the final bead purification, all three libraries were pooled as 80% mRNA library and 20% ADT library before sequencing.