CryoSPARC Guide
  • About CryoSPARC
  • Current Version
  • Licensing
    • Non-commercial license agreement
  • Setup, Configuration and Management
    • CryoSPARC Architecture and System Requirements
    • CryoSPARC Installation Prerequisites
    • How to Download, Install and Configure
      • Obtaining A License ID
      • Downloading and Installing CryoSPARC
      • CryoSPARC Cluster Integration Script Examples
      • Accessing the CryoSPARC User Interface
    • Deploying CryoSPARC on AWS
      • Performance Benchmarks
    • Using CryoSPARC with Cluster Management Software
    • Software Updates and Patches
    • Management and Monitoring
      • Environment variables
      • (Optional) Hosting CryoSPARC Through a Reverse Proxy
      • cryosparcm reference
      • cryosparcm cli reference
      • cryosparcw reference
    • Software System Guides
      • Guide: Updating to CryoSPARC v4
      • Guide: Installation Testing with cryosparcm test
      • Guide: Verify CryoSPARC Installation with the Extensive Validation Job (v4.3+)
      • Guide: Verify CryoSPARC Installation with the Extensive Workflow (≤v4.2)
      • Guide: Performance Benchmarking (v4.3+)
      • Guide: Download Error Reports
      • Guide: Maintenance Mode and Configurable User Facing Messages
      • Guide: User Management
      • Guide: Multi-user Unix Permissions and Data Access Control
      • Guide: Lane Assignments and Restrictions
      • Guide: Queuing Directly to a GPU
      • Guide: Priority Job Queuing
      • Guide: Configuring Custom Variables for Cluster Job Submission Scripts
      • Guide: SSD Particle Caching in CryoSPARC
      • Guide: Data Management in CryoSPARC (v4.0+)
      • Guide: Data Cleanup (v4.3+)
      • Guide: Reduce Database Size (v4.3+)
      • Guide: Data Management in CryoSPARC (≤v3.3)
      • Guide: CryoSPARC Live Session Data Management
      • Guide: Manipulating .cs Files Created By CryoSPARC
      • Guide: Migrating your CryoSPARC Instance
      • Guide: EMDB-friendly XML file for FSC plots
    • Troubleshooting
  • Application Guide (v4.0+)
    • A Tour of the CryoSPARC Interface
    • Browsing the CryoSPARC Instance
    • Projects, Workspaces and Live Sessions
    • Jobs
    • Job Views: Cards, Tree, and Table
    • Creating and Running Jobs
    • Low Level Results Interface
    • Filters and Sorting
    • View Options
    • Tags
    • Flat vs Hierarchical Navigation
    • File Browser
    • Blueprints
    • Workflows
    • Inspecting Data
    • Managing Jobs
    • Interactive Jobs
    • Upload Local Files
    • Managing Data
    • Downloading and Exporting Data
    • Instance Management
    • Admin Panel
  • Cryo-EM Foundations
    • Image Formation
      • Contrast in Cryo-EM
      • Waves as Vectors
      • Aliasing
  • Expectation Maximization in Cryo-EM
  • Processing Data in cryoSPARC
    • Get Started with CryoSPARC: Introductory Tutorial (v4.0+)
    • Tutorial Videos
    • All Job Types in CryoSPARC
      • Import
        • Job: Import Movies
        • Job: Import Micrographs
        • Job: Import Particle Stack
        • Job: Import 3D Volumes
        • Job: Import Templates
        • Job: Import Result Group
        • Job: Import Beam Shift
      • Motion Correction
        • Job: Patch Motion Correction
        • Job: Full-Frame Motion Correction
        • Job: Local Motion Correction
        • Job: MotionCor2 (Wrapper) (BETA)
        • Job: Reference Based Motion Correction (BETA)
      • CTF Estimation
        • Job: Patch CTF Estimation
        • Job: Patch CTF Extraction
        • Job: CTFFIND4 (Wrapper)
        • Job: Gctf (Wrapper) (Legacy)
      • Exposure Curation
        • Job: Micrograph Denoiser (BETA)
        • Job: Micrograph Junk Detector (BETA)
        • Interactive Job: Manually Curate Exposures
      • Particle Picking
        • Interactive Job: Manual Picker
        • Job: Blob Picker
        • Job: Template Picker
        • Job: Filament Tracer
        • Job: Blob Picker Tuner
        • Interactive Job: Inspect Particle Picks
        • Job: Create Templates
      • Extraction
        • Job: Extract from Micrographs
        • Job: Downsample Particles
        • Job: Restack Particles
      • Deep Picking
        • Guideline for Supervised Particle Picking using Deep Learning Models
        • Deep Network Particle Picker
          • T20S Proteasome: Deep Particle Picking Tutorial
          • Job: Deep Picker Train and Job: Deep Picker Inference
        • Topaz (Bepler, et al)
          • T20S Proteasome: Topaz Particle Picking Tutorial
          • T20S Proteasome: Topaz Micrograph Denoising Tutorial
          • Job: Topaz Train and Job: Topaz Cross Validation
          • Job: Topaz Extract
          • Job: Topaz Denoise
      • Particle Curation
        • Job: 2D Classification
        • Interactive Job: Select 2D Classes
        • Job: Reference Based Auto Select 2D (BETA)
        • Job: Reconstruct 2D Classes
        • Job: Rebalance 2D Classes
        • Job: Class Probability Filter (Legacy)
        • Job: Rebalance Orientations
        • Job: Subset Particles by Statistic
      • 3D Reconstruction
        • Job: Ab-Initio Reconstruction
      • 3D Refinement
        • Job: Homogeneous Refinement
        • Job: Heterogeneous Refinement
        • Job: Non-Uniform Refinement
        • Job: Homogeneous Reconstruction Only
        • Job: Heterogeneous Reconstruction Only
        • Job: Homogeneous Refinement (Legacy)
        • Job: Non-uniform Refinement (Legacy)
      • CTF Refinement
        • Job: Global CTF Refinement
        • Job: Local CTF Refinement
        • Job: Exposure Group Utilities
      • Conformational Variability
        • Job: 3D Variability
        • Job: 3D Variability Display
        • Job: 3D Classification
        • Job: Regroup 3D Classes
        • Job: Reference Based Auto Select 3D (BETA)
        • Job: 3D Flexible Refinement (3DFlex) (BETA)
      • Postprocessing
        • Job: Sharpening Tools
        • Job: DeepEMhancer (Wrapper)
        • Job: Validation (FSC)
        • Job: Local Resolution Estimation
        • Job: Local Filtering
        • Job: ResLog Analysis
        • Job: ThreeDFSC (Wrapper) (Legacy)
      • Local Refinement
        • Job: Local Refinement
        • Job: Particle Subtraction
        • Job: Local Refinement (Legacy)
      • Helical Reconstruction
        • Helical symmetry in CryoSPARC
        • Job: Helical Refinement
        • Job: Symmetry search utility
        • Job: Average Power Spectra
      • Utilities
        • Job: Exposure Sets Tool
        • Job: Exposure Tools
        • Job: Generate Micrograph Thumbnails
        • Job: Cache Particles on SSD
        • Job: Check for Corrupt Particles
        • Job: Particle Sets Tool
        • Job: Reassign Particles to Micrographs
        • Job: Remove Duplicate Particles
        • Job: Symmetry Expansion
        • Job: Volume Tools
        • Job: Volume Alignment Tools
        • Job: Align 3D maps
        • Job: Split Volumes Group
        • Job: Orientation Diagnostics
      • Simulations
        • Job: Simulate Data (GPU)
        • Job: Simulate Data (Legacy)
    • CryoSPARC Tools
    • Data Processing Tutorials
      • Case study: End-to-end processing of a ligand-bound GPCR (EMPIAR-10853)
      • Case Study: DkTx-bound TRPV1 (EMPIAR-10059)
      • Case Study: Pseudosymmetry in TRPV5 and Calmodulin (EMPIAR-10256)
      • Case Study: End-to-end processing of an inactive GPCR (EMPIAR-10668)
      • Case Study: End-to-end processing of encapsulated ferritin (EMPIAR-10716)
      • Case Study: Exploratory data processing by Oliver Clarke
      • Tutorial: Tips for Membrane Protein Structures
      • Tutorial: Common CryoSPARC Plots
      • Tutorial: Negative Stain Data
      • Tutorial: Phase Plate Data
      • Tutorial: EER File Support
      • Tutorial: EPU AFIS Beam Shift Import
      • Tutorial: Patch Motion and Patch CTF
      • Tutorial: Float16 Support
      • Tutorial: Particle Picking Calibration
      • Tutorial: Blob Picker Tuner
      • Tutorial: Helical Processing using EMPIAR-10031 (MAVS)
      • Tutorial: Maximum Box Sizes for Refinement
      • Tutorial: CTF Refinement
      • Tutorial: Ewald Sphere Correction
      • Tutorial: Symmetry Relaxation
      • Tutorial: Orientation Diagnostics
      • Tutorial: BILD files in CryoSPARC v4.4+
      • Tutorial: Mask Creation
      • Case Study: Yeast U4/U6.U5 tri-snRNP
      • Tutorial: 3D Classification
      • Tutorial: 3D Variability Analysis (Part One)
      • Tutorial: 3D Variability Analysis (Part Two)
      • Tutorial: 3D Flexible Refinement
        • Installing 3DFlex Dependencies (v4.1–v4.3)
      • Tutorial: 3D Flex Mesh Preparation
    • Webinar Recordings
  • Real-time processing in cryoSPARC Live
    • About CryoSPARC Live
    • Prerequisites and Compute Resources Setup
    • How to Access cryoSPARC Live
    • UI Overview
    • New Live Session: Start to Finish Guide
    • CryoSPARC Live Tutorial Videos
    • Live Jobs and Session-Level Functions
    • Performance Metrics
    • Managing a CryoSPARC Live Session from the CLI
    • FAQs and Troubleshooting
  • Guides for v3
    • v3 User Interface Guide
      • Dashboard
      • Project and Workspace Management
      • Create and Build Jobs
      • Queue Job, Inspect Job and Other Job Actions
      • View and Download Results
      • Job Relationships
      • Resource Manager
      • User Management
    • Tutorial: Job Builder
    • Get Started with CryoSPARC: Introductory Tutorial (v3)
    • Tutorial: Manually Curate Exposures (v3)
  • Resources
    • Questions and Support
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On this page
  • Description
  • Input
  • Common Parameters
  • Output
  • Notes and Limitations
  • Box sizes that allow for efficient processing
  1. Processing Data in cryoSPARC
  2. All Job Types in CryoSPARC
  3. Extraction

Job: Extract from Micrographs

Extract picked particles from micrographs using a specified box size.

PreviousExtractionNextJob: Downsample Particles

Last updated 10 months ago

Description

Extract picked particles from micrographs using a specified box size.

There are two job types available in CryoSPARC for Extraction. One runs on the GPU and the other on the CPU. Generally, extraction of particles is not computationally intensive but is bottlenecked by speed of reading and writing micrograph and particle stack files. It therefore runs equally fast on CPU compared to GPU in most cases.

The GPU-enabled job can utilize multiple GPUs, and the CPU-enabled job can utilize multiple CPU cores.

In CryoSPARC v4.0, the CPU extraction job has a new option to output two different particle outputs, one at a larger and one at a smaller downsampled box size. The smaller downsampled particles can be used for faster initial 2D and 3D classification, and the larger box size particles can be used for further processing and final refinements. See the Second (small) F-crop box size (pix) parameter description below.

Input

  • Aligned/motion-corrected micrographs

  • Particle locations

Common Parameters

  • Extraction box size: This controls the size of the extraction box, in pixels. See the Box sizes that allow for efficient processing section for appropriate sizes.

  • Fourier-crop to box size (pix) : If this is set, the job will also perform particle downsampling to this specified box size, using Fourier cropping. See the Box sizes that allow for efficient processing section for appropriate sizes.

  • Second (small) F-crop box size (pix) : This is only available in CryoSPARC v4.0+ and in the CPU extraction job type. If set, the job will output a second particles output called “Particles small” with the same particles but downsampled to a smaller box size using Fourier cropping. Connect these particles to downstream 2D classification or 3D reconstruction jobs, and later in the processing pipeline, you can use the “Particles” output’s blob result to replace the particles with the higher resolution extracted particles for refinements and further advanced processing. See the . See the Box sizes that allow for efficient processing section for appropriate sizes.

  • For the GPU-enabled job type, you can set the Number of GPUs parameter to parallelize over GPUs.

  • For the CPU-enabled job type, you can set the Number of CPU cores parameter to parallelize over multiple CPUs.

  • Recenter using aligned shifts

    • Activated by default, this will cause the extracted picks to be re-centered if the 2D or 3D shifts are present from previous 2D classification or 3D reconstruction/refinement jobs

    • Re-centering will update both the location results (to store the new extraction centres) and alignments2D or alignments3D results (to store the residual <1 pixel shift after updating the locations)

  • Save results in 16-bit floating point: Saves the output particles in (CryoSPARC v4.4+).

Output

  • Particles

  • Particles small (Optional depending on parameters)

Notes and Limitations

  • Do not extract particles from micrographs if you plan to run Local Motion Correction, as this latter job type will perform extraction.

  • Particles too close to the edges of a micrograph will not be included in the particles output from this job. See the job stream log for more information on how many particles were not included.

Box sizes that allow for efficient processing

When selecting a box size or a Fourier-cropping box size, an even number must be selected. In addition, it is computationally more efficient to select numbers from the following list:

32, 36, 40, 42, 48, 56, 60, 64, 70, 72, 80, 84, 90, 96, 100, 108, 112, 120, 128, 144, 160, 180, 192, 200, 216, 224, 240, 256, 270, 288, 300, 320, 324, 336, 384, 400, 432, 448, 450, 512, 576, 640, 648, 672, 720, 768, 784, 810, 864, 882, 1024, 1152, 1280, 1296, 1344, 1440, 1568, 1620, 1728, 1792, 2000, 2048, 2160, 2592, 2744, 3456, 4096

The reason these box sizes are faster is that they have a small number of unique prime factors (2, 3, 5, 7, etc) and this is important for the Fast Fourier Transform to perform efficiently.

tutorial on low-level results
float16 format