**Competent bacteria** Nicolas Fix-Boulier is in charge of preparing competent bacteria for the lab. The samples are stored in the -80°C freezer (room 512) at location D15 “Nicolas Fix-Boulier 1” Freezer map : https://docs.google.com/spreadsheets/d/1WGb9CcmWcThByh898cLyvHu-it-QpbtobJZLc4Cj36o/edit#gid=0 (ask Nicolas for the right to access the link) Samples are identified as follows: * One same symbol = same batch of preparation * A red dot = a batch has been tested with a control transformation (it is not recommended to use a batch if it has not yet been tested)