PhOtOnQuAnTiQuE posted a photo:
In Paris, tonight at a great conference on Synthetic biology, with Antoine Danchin (director of the Department Genomes and Genetics at the Institut Pasteur)
Here he was presenting a cool and very interesting thing, call Segregation of chromosomes by entropy :
"The rapid and abrupt nature of chromosome segregation in bacteria has led researchers to suspect eukaryotic-like mechanisms based on active cytoskeletal proteins. Jun approached the problem from a very different viewpoint: that of a polymer physicist. Polymers tend to repel each other because of the greater conformational freedom, and thus higher entropy that results if they untangle and separate. It is this tendency, which is much stronger in confined spaces such as the cell, that the Dutch group believes is the driver for chromosome segregation.
They devised a mathematical model of bacterial chromosome replication and segregation. In this model, the existing DNA is constrained within a nucleoid, and newly replicated DNA is ejected by entropic forces into a peripheral region. Based purely on a consideration of entropic states, the bacterial chromosomes segregated rapidly after replication. Supercoiling and DNA condensation are expected to increase the structure of a given chromosome and increase the entropic effects ... "
Froda posted a photo:
William Dodge House (Greyston Conference Center), Riverdale, Bronx, New York Cityjag9889 posted a photo:
690 West 247th Street, Bronx NYC
In 1863, William E. Dodge built Greyston, a gambrel-roofed Tudor Revival mansion of granite designed by James Renwick, Jr. (added 1977 to the National Register of Historic Places - #77000934).
William Dodge House (Greyston Conference Center), Riverdale, Bronx, New York Cityjag9889 posted a photo:
690 West 247th Street, Bronx NYC
In 1863, William E. Dodge built Greyston, a gambrel-roofed Tudor Revival mansion of granite designed by James Renwick, Jr. (added 1977 to the National Register of Historic Places - #77000934).
William Dodge House (Greyston Conference Center), Riverdale, Bronx, New York Cityjag9889 posted a photo:
690 West 247th Street, Bronx NYC
In 1863, William E. Dodge built Greyston, a gambrel-roofed Tudor Revival mansion of granite designed by James Renwick, Jr. (added 1977 to the National Register of Historic Places - #77000934).
