What does it mean to index a reference genome?
Indexing a genome can be explained similar to indexing a book. If you want to know on which page a certain word appears or a chapter begins, it is much more efficient/faster to look it up in a pre-built index than going through every page of the book until you found it. Same goes for alignments.
What is RefSeq in bioinformatics?
The Reference Sequence (RefSeq) collection provides a comprehensive, integrated, non-redundant, well-annotated set of sequences, including genomic DNA, transcripts, and proteins. RefSeq sequences form a foundation for medical, functional, and diversity studies.
What does NM_ mean in genetics?
NM (Neutrophil Migration) is a Genetic Locus.
What is NC in NCBI?
From The NCBI Handbook, ch18: (via this answer) NC – “Complete genomic molecule, usually reference assembly”
How do you use BWA MEM?
Step 1: Index the reference database file that comprises 59 genomes. Step 2: Use BWA-MEM to align paired-end sequences. Briefly, the algorithm works by seeding alignments with maximal exact matches (MEMs) and then extending seeds with the affine-gap Smith-Waterman algorithm (SW). Step 3: Convert sam file to bam file.
What is the difference between GenBank and RefSeq sequences?
What is the difference between RefSeq and GenBank? GenBank sequence records are owned by the original submitter and cannot be altered by a third party. RefSeq sequences are not part of the INSDC but are derived from INSDC sequences to provide non-redundant curated data representing our current knowledge of known genes.
How do you find the reference sequence?
How to: Find a curated version of a sequence record (NCBI Reference Sequence)
- Search the Gene database with the gene name, product name, or symbol.
- Click on the desired gene.
- Click on “Reference Sequences” in the Table of Contents at the upper right of the gene record.
What is XM in NCBI?
Accession numbers that begin with the prefix XM_ (mRNA), XR_ (non-coding RNA), and XP_ (protein) are model RefSeqs produced either by NCBI’s genome annotation pipeline or copied from computationally annotated submissions to the INSDC.
What does XM mean in NCBI?
RefSeq categories
| Category | Description |
|---|---|
| NM | mRNA |
| NR | ncRNA |
| NP | Protein |
| XM | predicted mRNA model |
What is the difference between BWA and BWA-MEM?
BWA-MEM and BWA-SW share similar features such as long-read support and split alignment, but BWA-MEM, which is the latest, is generally recommended for high-quality queries as it is faster and more accurate. BWA-MEM also has better performance than BWA-backtrack for 70-100bp Illumina reads.
