Yaamini’s Notebook: Gigas Broodstock DNA Extraction Part 8

Sample extraction: Day 1

Based on Sam’s response in this issue, I was safe to extract DNA using the TissueTearor at setting 1 for 10 seconds for the following samples:

Low pH:

  • 6-T1
  • 9-T2
  • 2-T1
  • 5-T3
  • 4-T3

Ambient pH:

  • UK-07
  • 12-T6
  • UK-04
  • UK-03
  • UK-01

Kailtyn and I followed this protocol. Here are some notes:

  • Step 1: Kaitlyn carved out the tissue from histology blocks while I was in class. There are definitely some samples that I cannot re-extract DNA from or try and extract RNA from.

Table 1. Mass of samples used for DNA extractions.

Sample ID Mass (mg)
2-T1 19.7
4-T3 19.8
6-T1 20.0
5-T3 20.0
9-T2 19.6
12-T6 20.0
UK-03 19.8
UK-01 19.7
UK-04 20.0
UK-07 19.9


Figure 1. Histology blocks after carving.

  • Step 10: Kaitlyn removed sample 2-T1 from the heat block after 16 minutes of ethanol evaporation. She saw some ethanol left in the rest of the samples, so she pipetted the supernatant. The remaining samples were incubated on the heating block an additional 5 minutes (20 minutes total), then removed.
  • Step 11: UK-07 was dropped, but nothing spilled out (from what we could tell)
  • Step 12: Taught Kaitlyn how to use the TissueTearor!


Figure 2. Kaitlyn using the TissueTearor.

  • Step 17: Incubated samples with RNase an extra 5 minutes while waiting for the heat block to reach 80ºC.
  • Step 18: Relabeled some sample tubes (markings on either top or side had rubbed off) after the fourth 10 minute incubation and one minute vortex. Both labels on UK-03 rubbed off.
  • Steps 28-32: Kaitlyn needed to leave, but she wanted to learn how to use the Qubit. We decided to save this series for Friday.

I stored the samples in the fridge. We’ll see how we did tomorrow!

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