6R2O image
Entry Detail
PDB ID:
6R2O
Title:
Hemoglobin structure from serial crystallography with a 3D-printed nozzle.
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2019-03-18
Release Date:
2020-01-29
Method Details:
Experimental Method:
Resolution:
2.46 Å
R-Value Free:
0.21
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Hemoglobin subunit alpha
Chain IDs:A, C
Chain Length:141
Number of Molecules:2
Biological Source:Equus caballus
Polymer Type:polypeptide(L)
Description:Hemoglobin subunit beta
Chain IDs:B, D
Chain Length:145
Number of Molecules:2
Biological Source:Equus caballus
Primary Citation
Ultracompact 3D microfluidics for time-resolved structural biology.
Nat Commun 11 657 657 (2020)
PMID: 32005876 DOI: 10.1038/s41467-020-14434-6

Abstact

To advance microfluidic integration, we present the use of two-photon additive manufacturing to fold 2D channel layouts into compact free-form 3D fluidic circuits with nanometer precision. We demonstrate this technique by tailoring microfluidic nozzles and mixers for time-resolved structural biology at X-ray free-electron lasers (XFELs). We achieve submicron jets with speeds exceeding 160 m s-1, which allows for the use of megahertz XFEL repetition rates. By integrating an additional orifice, we implement a low consumption flow-focusing nozzle, which is validated by solving a hemoglobin structure. Also, aberration-free in operando X-ray microtomography is introduced to study efficient equivolumetric millisecond mixing in channels with 3D features integrated into the nozzle. Such devices can be printed in minutes by locally adjusting print resolution during fabrication. This technology has the potential to permit ultracompact devices and performance improvements through 3D flow optimization in all fields of microfluidic engineering.

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