Three patients lacking normal convolutions in their brains were found to have mutations in the LAMC-3 gene. This gene codes for the gamma chain of laminin. Laminins and collagen comprise the basement membranes beneath the body’s cells. There are many laminins, each consisting of various combinations of three subunits. The gamma-3 subunit is found in large amounts in the human brain late in gestation and in infancy when connections between neurons are rapidly forming.1 Although the LAMC-3 gene is present in “lower organisms with smooth brains,” this heavy concentration in the fetal brain is a human characteristic.
Calling the human cerebral cortex “the crown jewel of creation,” Yale’s Professor Gunel wonders how the LAMC-3 gene evolved to produce the abundant convolutions seen in humans. Only mammals with large brains have significant convolutions, which are most pronounced in humans. Convolutions greatly increase the brain’s surface area, and experts believe this feature makes complex thinking possible.
Further research may someday detect genetic factors which regulate the enhanced use of the gamma-3 chain of laminin in human brain formation. The presence of the same gene in multiple organisms and its enhanced role in humans does not require that humans evolved from inferior ancestors or that the LAMC-3 gene evolved to take on new roles. Rather, God used the same biochemistry in many creatures and created each fully functional with the genes properly regulated and no evolutionary experimentation necessary.
- Get Answers: Genetics
For More Information: Get Answers
Remember, if you see a news story that might merit some attention, let us know about it! (Note: if the story originates from the Associated Press, FOX News, MSNBC, the New York Times, or another major national media outlet, we will most likely have already heard about it.) And thanks to all of our readers who have submitted great news tips to us. If you didn’t catch all the latest News to Know, why not take a look to see what you’ve missed?