The Starting Block
The Starting Block
The 23rd Block: Cut-and-paste title here
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The 23rd Block: Cut-and-paste title here

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Old Tech is dead, long live Old Tech


Cut-and-paste title here

Emmanuelle Charpentier and Jennifer A. Doudna. (Image by Niklas Elmehed and Nobel Media.)

The Nobel Prize in Chemistry was jointly awarded to Emmanuelle Charpentier and Jennifer Doudna for their work on CRISPR-Cas9, a genome editing method.

It’s a relatively recent work – only eight years ago did they co-author their first paper describing CRISPR-Cas9. Now, the ‘genetic scissors’ are used in medicine to find the cure for genetic disorders such as sickle cell disease and in agriculture to create hardier crops. Controversially, in 2018, Chinese scientists used the technology to edit human embryonic genes to create genetically modified babies.

In 2017, I produced an interview with neurogeneticist Dr Azlina Ahmad Annuar about the science and ethics of genome editing. You can listen to it here; she is an excellent science communicator. If that doesn’t convince you, here’s a spoiler: In it, she hinted of her suspicion of scientists creating genetically edited babies – a year before the He Jiankui affair was publicised.

Ishino and Mojica’s bacteria 🔬
Nevertheless, it should be noted that there would be no CRISPR-Cas9 without Yoshizumo Ishino’s 1987 description of strange sequences of DNA in E. coli that became the basis of the discovery of CRISPR by microbiologist Francisco Mojica. Mojica first identified the repetitive DNA sequences in 1993 and found that similar sequences were common in prokaryotes such as archaea and bacteria.

He demonstrated that the sequences matched genetic materials in bacteriophages, which are viruses that infect bacteria. By the early 2000s, he hypothesised that they were an innate part of the microbial immune system, but it was rejected four times by leading science journals until it was published in 2005. He called the sequences Clustered Regularly Interspaced Short Palindromic Repeats, or CRISPR.

Mojica agrees being an outsider, not coming from somewhere like Harvard, meant his ideas weren’t readily accepted. But the hostile reception was also due to how surprising the findings were.

Doudna and Charpentier’s scissors ✂️
In simple terms, CRISPR helps microbes fight off viral infections by cutting the virus’ DNA, inactivating it. Doudna and Charpentier built on this knowledge to programme the CRISPR system to cut other pieces of DNA. They use CRISPR-associated proteins, or Cas. There are other Cas enzymes but Cas9 comes from the strep throat bacteria.

They re-engineered Cas9, so that it can be instructed to snip predefined and specific parts of the DNA. CRISPR-Cas9 system has a guide RNA that determines where the cleavage site is. The guide RNA’s nucleotide sequence is manipulated to target any DNA sequence for cleavage. When the strand is broken, the cell’s system stitches the two ends together. To ‘cut-and-paste,’ you can insert replacement sequences at the splice site before the repair system kicks in.

Similarly, biochemist Feng Zhang modified the CRISPR-Cas9 to make precise genome cuts in human and mouse cells, as did George Church. But it was biochemist Dana Carroll who first developed a genome-editing method using enzymes, called zinc-finger nucleases, first described in 1996 – before CRISPR was adapted.

Ugh, the future is female, amirite👩‍🔬
The announcement makes it the first time the award has gone to two women, making them only the sixth and seventh women in history to win the chemistry prize. Some (1, 2, 3, 4) have expressed disappointment and/or surprise that Mojica, Zhang, Church or even Carroll were overlooked.

I think it is what women like Rosalind Franklin (the double helix), Lise Meitner (nuclear fission), Hedy Lamarr (Wi-Fi, CDMA, Bluetooth) – just to name a few – felt like when they made a discovery, only for the men to take all the credit.

I guess the winning duo will also win the patent battle.


What I read, watch and listen to…


Chart of the week

Abbie Richard’s conspiracy chart, although I question whether #FreeBritney is appropriately placed:


Transcript for audio

Four years ago today, just over a year after I had started my job as a producer at a radio station, I received a phone call during a live segment that I can never forget. That show was in conjunction with World Mental Health Day, observed every October 10th. It was also the run-up to the 2016 US presidential election, and on the show, we had psychiatrist Dr Stephen Jambunathan discussing delusions – the leading question being, “What do politics and relationships have in common?”
Towards the end of the show, I was ready to signal to my presenter, Lee Chwi Lynn, to tell her that I was closing the phone lines so she could wrap up the show. And then the studio phone rang. I had to make a quick decision and chose to answer and screen the caller. It was a man in distress. I signalled to my presenter that I was going to patch the call through. Here is an edited down version of the call. Some parts of this audio segment might be distressing for those struggling with their mental health. Please skip the next three minutes if you think you could be affected. [CLIP - 3:00]
Towards the end of my time in BFM, I was burning out. Often times I wondered what kind of impact my job makes in people’s lives. Often times I wondered if the media is too out of touch and out of reach. Often times, I questioned if radio, as a mass communication medium, is able to be personal. But every time I caught myself questioning why I was doing what I was doing, I would remind myself of that show. And to this day I still think about that caller and wonder if he is in a better place now.
As for the state of the world four years later, it certainly feels like déjà vu – but on steroids.
If you need emotional support, call The Befrienders KL at 03-7627 2929 or e-mail sam@befrienders.org.my. It’s 24/7, free and confidential.

The Starting Block is a weekly collection of notes on science and society with an emphasis on data, democracy, and disinformation. Read the archives. Find me on Twitter, Instagram and Linkedin. Send questions, corrections and suggestions to tinacarmillia@substack.com.
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The Starting Block
The Starting Block
A weekly collection of notes on science and society with an emphasis on disinformation, data, and democracy.