- Mar 16, 2004
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What is the problem with 7 amino acid replacements in a highly conserved brain related gene? The only observed effects of changes in this gene in humans is disease and disorder:"What is the problem with 7 amino acid replacements in a highly conserved brain related gene?"
The very thing you had provided to show that it is a big problem indicates:
"This is in stark contrast to the duplicate copies, which diverged from ancestral SRGAP2A less than 4 mya, but have accumulated as many as seven amino-acid replacements compared to one synonymous change."
You see, duplicates are NOT constrained.
These little problems for you are one of the reasons, I suspect, many find it easy to dismiss what you and your fans seem to think are major arguments against evolution, and it is one of the problems that I see in creationist/ID types that 'educate themselves' on these issues.
You miss the (accumulated requisite knowledge of the fields in question)forest for the (juicy 'this is a big problem for evilutionists!' quote)trees.
- 15,767 individuals reported by Cooper et al. (2011)] for potential copy-number variation. We identified six large (>1 Mbp) copy-number variants (CNVs), including three deletions of the ancestral 1q32.1 region…
- A ten year old child with a history of seizures, attention deficit disorder, and learning disabilities. An MRI of this patient also indicates several brain malformations, including hypoplasia of the posterior body of the corpus callosum…
- Translocation breaking within intron 6 of SRGAP2A was reported in a five-year-old girl diagnosed with West syndrome and exhibiting epileptic seizures, intellectual disability, cortical atrophy, and a thin corpus callosum. (Human-specific evolution of novel SRGAP2 genes by incomplete segmental duplication Cell May 2012)
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