# gRNA groups table

`gRNA_groups_table.Rd`

A data frame that maps each gRNA ID to its gRNA group and gRNA type. The columns are `gRNA_id` (required), `gRNA_group` (required), and `gRNA_type` (optional).

    data(gRNA_groups_table)

## Format

An object of class `tbl_df` (inherits from `tbl`, `data.frame`) with 50 rows and 3 columns.

## Overview

This object is part of the example data. The data are taken from the paper "A genome-wide framework for mapping gene regulation via cellular genetic screens" by Gasperini et al., 2019. The authors used a CRISPRi-based assay to target 5,000+ putative enhancers in a population of K562 cells. The authors additionally targeted 200+ gene transcription start sites (TSSs) and designed a library of 50 non-targeting gRNAs to serve as negative controls. Genes, gRNAs, and cells are all down-sampled to reduce the size of the data.