Gene Ontology Tool Selection
I am trying to do the gene ontology analysis based on the gene duplication to see weather there are any difference between gene duplication genes and control. I used the BLAST2GO a lot to get some...
View ArticleQuerying blast and getting raw hit fasta sequence
I have downloaded refseq_rna database and I want to query this database on my standalone blast with tblastn. I have many queries and what I want to achieve is to not only get blast alignments but also...
View ArticleBlastn Segmentation Fault
Hi,I am running a BLASTN of about 150 sequences against a genome that is 2.2 gigabases long. A few of my queries are actually full length BAC end sequences running to around 150,000 bases. I expect to...
View ArticleHow To Run Genome Wide Local Blast
Hi Everyone, I have been given a task to compare one gene sequence among 50 strain of E.coli. For this study i have 50 genome scaffold file and one gene sequence file. Now my work will be compare the...
View ArticleRun A Blast Daemon
I want to run my own BLAST daemon to avoid loading my blast db into RAM for every query.When I google it: I get a page from IBM that is out-of-date and a lot of other pages about Buffy the Vampire...
View ArticleMultiple Blast Output Formats From 1 Blast Run
Is it possible to generate 2 different output formats (tabular and the default one) by running blastn just once or I have to either1) Run it 2 times - one for each desired output2) Generate the tabular...
View ArticleIs It Possible To Get Near Global Alignment From Blast?
Hi to all When a query sequence identical to a database sequence is done BLAST, the alignment is shown for 100% of the sequence ie.complete coverage. Cannot this situation may be said global alignment?...
View ArticleLocal Graphic View Of Blast Results
When I do local BLAST with the parameter -m 8, I find that one query sequence can match the same subject sequence at several parts. I wonder if there is some tool that can read the BLAST m8 output and...
View ArticleHow To Blast Against A Local Database
I want to BLAST an mRNA reference sequence against a local database in my directory (a collection of RNA reference sequences) using a BioPython program. I know how to perform BLAST against online...
View ArticleHow To Search Blast With Ensg Id'S?
I have some ENSG id's and I would like to search BLAST database with this id's. When I use the ENSG id's directly, BLAST cannot find any genes. I think I need to convert the ENSG id's to some other...
View ArticleProblem using a custom blast database in tblastx
Hello. I tried to create a custom DB for blast. I downloaded fasta files from NCBI from an SRA project and then run this command makeblastdb -dbtype nucl -in sra_data-DB.fasta -input_type fasta -out...
View ArticleWhat to use for a measure of distance between two sequences?
I've got a lot of genetic sequences and I'd like to use various clustering algorithms on them, but this requires a measure of the distance between two sequences. I've used BLAST+ and the...
View ArticleBlastn / Tblastn : Mapping The Features Of The Query To The Hit.
I'm blasting+ (blastn+ or tblastn) an annotated sequence (a Genbank.xml sequence (nucleotide or protein) or an Uniprot.xml entry) against a DNA database.Is there a standard tool to map the features of...
View ArticleHow Long Should It Take To Make A Blast Database?
HiI'm trying to install a local copy of polyphen and one of the stages is to make a blastdb from uniref100.I ran this command last night and its still going nearly 12 hours later. I don't know if this...
View ArticleComparing Bowtie H_Sapiens_Asm Blastn -Task Blastn-Short -Db Human_Genomic
I am thinking the current supplied (pre-formatted) blastn humangenomic database from NCBI contains many many duplications of the same sequences. Is this correct? I think I only need the current...
View ArticleBiojava And Blast+
Dear all, i´m currently trying to parse several blast output files in order to show the results in my software. Since i have to carry out many blast searches from time to time, i decided to install the...
View ArticleHow Is The Score And E-Value Calculated In Blast Outputs
Hi!I am working on a BLAST similar tool and wanted to implement the Score (raw Alignment score) and the E-value. I was wondering if someone could please explain me how it is calculated by showing it...
View ArticleHow Can I Automate Blast Of >1 Sequence And Output The Top Hits For Each Input?
I'm looking for a way to do BLAST simultaneously with >1 sequence. The input is several fasta files or one file containing several sequence formatted in fasta. For an initial testing, I want to try...
View ArticleHow to analyze the ProDom output? I have some results to support the...
Hi all, I have some results retrieved from ProDom database and I need to analyze the output from 3 inputs to check if they share the same conserved domains, the results points to same description of...
View Article本地Blast的输入和输出问题
在这里学习了本地blast的使用，但是有个问题，本地blast默认的是标准输入和标准输出，由于需要，我希望将序列通过变量输入并且将比对结果输出到另一个变量。 比如 $reference中是一条序列（不是从文件读入） 而将结果输出到变量$blast_result（不是从文件读入）但是用如下脚本是无法实现的 my $localblast=system("$blastall -p blastp -d...
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