Such alternative approaches are derived from the standard ChIP method and include the initial formaldehyde crosslinking of protein:DNA complexes, yet typically differ in the use of protein fusion tags, which allow for complexes to be isolated using either an antibody against the tag [ 17, 21] or direct capture on a resin that interacts with the fusion tag [ 18- 20].
When we intentionally disrupted cluster N1a by mutating one of its cysteine ligands to either an alanine or serine residue, complex I activities in the resulting membrane preparations were very low, and any complex present was too unstable to be isolated (K. Dörner, M. Vranas, J. Hoeser, I. Straub, D. Thiel and T. Friedrich, unpublished work).
In summary, SEC indicates that each of the three αReps forms a complex with GFP stable enough to be isolated.
Mycobacterium yongonense, as a novel member of the M. avium complex (MAC), was recently reported to be isolated from human specimens in South Korea and Italy.
For example, clusters of low-degree proteins might imply selective complex formation, and hubs found to be isolated from other high-degree proteins may represent important bottlenecks.
A particular feature of these complexes is that polymers tend to be isolated with very narrow molecular weight distributions and that the molecular weights of the produced copolymer can be controlled.
The Pd DMAP 4(OH)2 complex can be isolated from the dispersion and is found to be very active in promoting the reactions.
The synaptic complex and strand transfer complex can be isolated by native agarose gel electrophoresis.
The complex can be isolated by precipitation with light petroleum as a yellow microcrystalline solid.
Thus, for example, during the catalytic intramolecular hydroarylation of allenes 100 to give 101, complex 102 was isolated as a catalyst resting state (Scheme 31).
