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Competent Cells: Standardize Protocols & Transformation QC #4

Description

@jcmolloy

Priority

🔴 Urgent — Competent cell quality is the most common failure point reported by network members attempting to transform plasmids sent through Reclone. This directly undermines the usability and impact of the collection.

Problem

Members receiving plasmids from the Reclone network frequently fail to transform them successfully, and the root cause is most often poor-quality or inconsistently-made competent cells — not the DNA itself. There is currently no standardized protocol, no efficiency benchmark, and no shared quality-control reference strain across the network.

Proposed Solution

Establish a standardized, well-documented competent cell workflow for the network:

  • A validated protocol for making competent cells (with a documented fallback method)
  • A transformation efficiency test using pUC19 as a QC standard
  • A defined go/no-go efficiency threshold so members can self-diagnose before troubleshooting downstream

Scope of this issue

This is a tracking issue. Work is broken into the sub-issues below.

Sub-issues

Definition of done

  • Protocol(s) published and linked from this issue
  • Go/no-go transformation efficiency threshold published
  • pUC19 included in all current and future collection plates
  • Recommended cell lines documented in contributor-facing docs

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