Showing posts with label single cell. Show all posts
Showing posts with label single cell. Show all posts

Saturday, November 27, 2021

single cell aging mouse brain (error)

 37069 cells

https://singlecell.broadinstitute.org/single_cell/study/SCP263/aging-mouse-brain

455M is too big to download by browser. 

Tring to get certificate at local server

openssl s_client -showcerts -servername singlecell.broadinstitute.org/single_cell/api/v1 -connect server:443 > cacert.pem

https://singlecell.broadinstitute.org/

singlecell.broadinstitute.org/single_cell/api/v1

(base) hqin@CS313BQin q-sandbox % which openssl

/Users/hqin/opt/anaconda3/bin/openssl

(base) hqin@CS313BQin q-sandbox % openssl s_client -showcerts -servername https://singlecell.broadinstitute.org -connect server:443 > cacert.pem

4504972800:error:2008F002:BIO routines:BIO_lookup_ex:system lib:crypto/bio/b_addr.c:730:nodename nor servname provided, or not known

connect:errno=0



CURL download error

curl: (60) SSL certificate problem: unable to get local issuer certificate

More details here: https://curl.haxx.se/docs/sslcerts.html


Monday, September 20, 2021

single cell multiplexed and image and proteomic data

Automated assignment of cell identity from single-cell multiplexed imaging and proteomic data

Geuenich Michael; Hou Jinyu; Lee Sunyun; Ayub Shanza;  Jackson Hartland;  Campbell Kieran 


https://zenodo.org/record/5156049#.YUjywGZKjzc


Monday, April 26, 2021

biohub, single cell data

 

single cell gene-networks, topological robustness of gene networks, cellular life in different tissues, blood versus neurons

https://tabula-microcebus-cellxgene.ds.czbiohub.org/all/



Monday, January 4, 2021

scDNA-seq and LOH monitoring in yeast aging

 single cell DNA seq

Natural communication, 2019, Luquette, .. Peter Park, Identification of somatic mutations in single cell DNA-seq using  a spatial model of allelic imbalance. 

somatic SNV (single nucleotide variation). 

variant allele fraction (VAF), the fraction of sequencing reads supporting allele a heterozygous variant. 

Qin: VAF on loss of heterozygosity during aging can be done with young cells as the background. The young cells provide a reference distribution of VAF at allelic positions genome-wide. Comparison between VAF of aging cells and young cells. If loss of heterozygocity occurs a loci, VAF at a loci can only be caused by amplification artifacts, which are expect to be 'random' and has a very small probability to overlap with the natural variations. S288c and RM is 0.5-1%. 

Luquette19 proposed a genome-location spatial model for Amplification Balance to evaluate VAF.  Luquette used nearby known SNP VAF to show the allele imbalance.  Luquette19 used a 'smooth curve' to model the spatial distribution of allele imbalance on chromosomes. 










Thursday, November 26, 2020

single cell DNA sequencing (genome sequencing)

 

=>QIAGEN single cell DNA library prep

https://www.qiagen.com/us/products/next-generation-sequencing/library-preparation/qiaseq-fx-single-cell-dna-library-kit/?cmpid=PC_GEN_single-cell-analysis-sales_0620_SEA_GA&clear=true#orderinginformation

The QIAseq FX Single Cell DNA Library kit provides a complete solution for whole genome sequencing from isolated single animal or bacterial cells or low amounts of genomic DNA. The kit includes all reagents required for cell lysis, whole genome amplification, enzymatic DNA fragmentation and PCR-free NGS library preparation. The kit provides comprehensive genome coverage and exceptional sequence fidelity, reducing false positives and minimizing drop-outs. The kit is ideally suited to the analysis of aneuploidy and copy number variation and sequence variation in single cells of for whole genome sequencing from rare samples