REAGENT or RESOURCE	SOURCE	IDENTIFIER
Flow cytometry staining reagents
PE anti-DYKDDDDK Tag Antibody	Biolegend	Cat# 637309;
anti-human IgG-AlexaFluor647	Jackson Immunoresearch	109-605-098;
biotinylated human ACE2	Acro	Cat# AC2-H82E6
streptavidin-AlexaFluor 647	Biolegend	Cat# 405237
Deposited data
Raw sequencing data	Starr et al. 2020	NCBI SRA: BioProject PRJNA639956
Raw and processed sequencing data	This study
Oligonucleotides
Degenerate Ultramers and oPools for RBD library construction	IDT	https://github.com/LSSI-ETH
Recombinant DNA
pYD1-RBD(wt)	This study	https://github.com/LSSI-ETH; derived from RRID:Addgene_73447
Cell lines
EBY100	ATCC	Cat# MYA-4941
Software and algorithms
bbduk	Joint Genome Institute	https://jgi.doe.gov/data-and-tools/software-tools/bbtools/bb-tools-user-guide/bbduk-guide/
custom scripts for curation, analysis, and visualization	This study	https://github.com/LSSI-ETH