In this post I'll address the 7 questions on foreign policy using the same format.
More Recent Comments
Thursday, August 29, 2024
The New York Times questions for Kamala Harris: Foreign Policy
The New York Times questions for Kamala Harris: Social Issues
Tuesday, August 27, 2024
The New York Times has 21 questions for Kamala Harris (and Trump?)
Sunday, August 25, 2024
Some transcription factors can be both activators and repressors! Textbooks have been saying this for decades
This is another post about a bad press release based on a lack of knowledge of the history of the field.
Here's the press release from Washington State University as reported in SciTechDaily
Scientists Discover “Spatial Grammar” in DNA: Breakthrough Could Rewrite Genetics Textbooks
“Contrary to what you will find in textbooks, transcription factors that act as true activators or repressors are surprisingly rare,” said WSU assistant professor Sascha Duttke, who led much of the research at WSU’s School of Molecular Biosciences in the College of Veterinary Medicine.
Rather, the scientists found that most activators can also function as repressors.
“If you remove an activator, your hypothesis is you lose activation,” said Bayley McDonald, a WSU graduate student who was part of the research team. “But that was true in only 50% to 60% of the cases, so we knew something was off.”
Looking closer, researchers found the function of many transcription factors was highly position-dependent.
They discovered that the spacing between transcription factors and their position relative to where a gene’s transcription began determined the level of gene activity. For example, transcription factors might activate gene expression when positioned upstream or ahead of where a gene’s transcription begins but inhibit its activity when located downstream, or after a gene’s transcription start site.
... By integrating this newly discovered ‘spatial grammar,’ Christopher Benner, associate professor at UC San Diego, anticipates scientists can gain a deeper understanding of how mutations or genetic variations can affect gene expression and contribute to disease.
”The potential applications are vast,” Benner said. “At the very least, it will change the way scientists study gene expression.”
Wednesday, August 14, 2024
Is the Teacher Institute for Evolutionary Science spreading misinformation?
A good teacher can teach any subject as long as they have high-quality resources. TIES provides middle school and elementary teachers the tools they need to effectively teach evolution and answer its critics based on new Next Generation Science Standards.
The Teacher Institute for Evolutionary Science began as a program of the Richard Dawkins Foundation for Reason & Science and it's now part of the Center for Inquiry.
TIES recently posted a video with an interesting title on their YouTube channel: "Beyond DNA: How Epigenetics is Transforming our Understanding of Evolution." This is a presentation by Ben Oldroyd who wrote a book titled "Beyond DNA."
Watch the video and decide for yourself whether you think this is what teachers of evolutionary biology should be telling their students. What part of understanding evolution do you think needs to be transformed by epigenetics?
Monday, August 12, 2024
Zach Hancock explains junk DNA
Zach Hancock is a postdoc in ecology & evoluvionary biology at the University of Michigan. He has a YouTube channel with several thousand subscribers. You might recall that he interviewed me last year when my book came out [Zach Hancock interviews me on his YouTube channel].
He has just posted a new video on junk DNA that's well worth watching. He tries to correct all the falsehoods and misinformation on junk DNA, especially those promoted by creationists. It's well worth watching.
Tuesday, August 06, 2024
Is Casey Luskin lying about junk DNA or is he just stupid?
I'm going to address a recent article by Casey Luskin on Evolution News (sic) and a podcast on a Current Topics in Science podcast produce by Christ Jesus Ministries. But first, some background.
A recent paper in Nature looked at a region on chromosome 21 where mutations associated with autoimmune and inflammatory disease were clustered. This region did not contain any known genes and is referred to in the paper as a "gene desert." The authors reasoned that it probably contained one or more regulatory sites and, as expected, they were able to identify an enhancer element that helps control expression of a nearby gene called ETS2 (Stankey et al., 2024).
The results were promoted in a BBC article: The 'gene deserts' unravelling the mysteries of disease. The subtitle of the article tells you where this is going, "Mutations in these regions of so-called "junk" DNA are increasingly being linked to a range of diseases, from Crohn's to cancer." The article implies that since only 2% of the human genome codes for proteins the remaining 98% "has no obvious meaning or purpose." The caption to one of the figures says, "Gene deserts are regions of so-called genetic "junk" that do not code for proteins – but they may play an important role in disease." Thus, according to the BBC, the discovery of a regulatory sequence conflicts with the idea of junk DNA.
There's no mention of junk DNA in the original Nature article and none of the comments by the senior author (James Lee) in the BBC article suggest that he is confused about junk DNA.
An article published in Nature Communications looked at expression of human endogenous retrovirus elements (HERV's) in human brain. The authors found that expression of two HERV sequences is associated with risk for schizophrenia but the authors noted that is wasn't clear how this expression played a role in psychiatric disorders (Duarte et al., 2024)
Although the term "junk DNA" was not mentioned in the original article, the press release from King's College, London makes the point that HERVS were assumed to be junk DNA. The implication is that this is one of the first publications to discover a possible function for this junk DNA. (Functional elements derived from HERVs have been known for three decades.)
Casey Luskin wrote about these studies yesterday in an article on the intelligent design website: Disease-Associated “Junk” DNA Is Evidence of Function and talks about it in the podcast that I link to below.
Luskin continues to promote the false claim that all non-coding DNA was assumed to be junk. That allows him to highlight all studies that discover new functional elements in non-coding DNA and claim that it refutes junk DNA. He's been doing this for years in spite of multiple attempts to correct him. Therefore, the answer to the question in the title in obvious, he is a liar—judge for yourselves whether he is also stupid.
Duarte et al. (2024) Integrating human endogenous retroviruses into transcriptome-wide association studies highlights novel risk factors for major psychiatric conditions. Nature Communications 15: 3803 [doi: 10.1038/s41467-024-48153-z]
Stankey et al. (2024) A disease-associated gene desert directs macrophage inflammation through ETS2. Nature 630: 447–456 [doi: 10.1038/s41586-024-07501-1]