DOI: 10.5061/dryad.9s4mw6mp2
title: Sars-Cov-2 and Mers sequences from human host with no unknown characters

description: The datasets are organized as follows: first column, number of bases in a
 given sequence; second, third, fourth and fifth columns, number of bases
 of type A, C, G and T, respectively, in the same sequence.  1)
 Sars-Cov-2 dataset. This dataset contains number of bases for the
 complete genome sequences from a human host, with none unknown
 characters.  In the NCBI database, there are about 950.000
 sequences with these characteristics. 2) Restricted Sars-Cov-2 dataset:
 This dataset contains number of bases for the complete sequences from a
 human host, with no unknown characters, with 29903 bases, that is of the
 same length as the reference sequence NC045512.2. We obtained, from the
 NCBI database, about 5600 sequences with such features. 3) Mers dataset:
 This dataset contains number of bases for the complete sequences of about
 200 complete genome sequences from a human host, with no unknown
 characters.
description: Raw datasets are genome sequences retrieved from the National
 Center for Biotechnology Information (NCBI) database
 (https://www.ncbi.nlm.nih.gov). The sequences were filtered according to
 the following criteria: <strong>1) Sars-Cov-2
 dataset. </strong>This dataset contains complete genome sequences
 from a human host, with none unknown characters.  In the NCBI
 database, there are about 950.000 sequences with these
 characteristics. <strong>2) Restricted Sars-Cov-2
 dataset:</strong> This dataset contains complete genome sequences
 from a human host, with no unknown characters, with 29903 bases, that is
 of the same length as the reference sequence NC045512.2. We obtained, from
 the NCBI database, about 5600 sequences with such features.
 <strong>3) Mers dataset:</strong> We selected about
 200 complete genome sequences from a human host, with no unknown
 characters. Raw data
 have been processed through a C++ code (provided with the datsets) that
 reads a dataset of nucleic acid sequences in FASTA format and returns the
 number of bases in each sequence. The output file seqcount.txt contains a
 table organized as follows: first column, number of bases in a given
 sequence; second, third, fourth and fifth columns, number of bases of type
 A, C, G and T, respectively, in the same sequence. Each row reports the
 data calculated for successive sequences following the same order of the
 raw datasets.
description: # Sars-Cov-2 and Mers sequences from human host with none unknown
 characters We uploaded
 three datasets organized as follows: first column, number of bases in a
 given sequence; second, third, fourth and fifth columns, number of bases
 of type A, C, G and T, respectively, in the same sequence.  **1)
 Sars-Cov-2 dataset.** This dataset contains number of bases for the
 complete genome sequences from a human host, with none unknown
 characters.  In the NCBI database, there are about 950.000 sequences with
 these characteristics. **2) Restricted Sars-Cov-2 dataset:** This dataset
 contains number of bases for the complete sequences from a human host,
 with no unknown characters, with 29903 bases, that is of the same length
 as the reference sequence NC045512.2. We obtained, from the NCBI database,
 about 5800 sequences with such features. **3) Mers dataset:** This dataset
 contains number of bases for the complete sequences of about 250 complete
 genome sequences from a human host, with no unknown characters. ##
 Description of the data Each dataset is organized as follows: first
 column, number of bases in a given sequence; second, third, fourth and
 fifth columns, number of bases of type A, C, G and T, respectively, in the
 same sequence. Each row reports the data calculated for successive
 sequences following the same order of the raw data (see links below). ##
 Sharing information Raw data are freely available at the following
 address:
 [https://www.ncbi.nlm.nih.gov/labs/virus/vssi/#/virus?VirusLineage_ss=Severe%20acute%20respiratory%20syndrome%20coronavirus%202%20(SARS-CoV-2),%20taxid:2697049&SeqType_s=Nucleotide](https://www.ncbi.nlm.nih.gov/labs/virus/vssi/#/virus?VirusLineage_ss=Severe%20acute%20respiratory%20syndrome%20coronavirus%202%20(SARS-CoV-2),%20taxid:2697049&SeqType_s=Nucleotide) ## Code **Readfasta: a C++ code for sequence base count.** Datasets are obtained We provide a C++ computer code that reads a dataset of nucleic acid sequences in FASTA format and returns the number of bases in each sequence. The output file seqcount.txt contains a table organized as follows: first column, number of bases in a given sequence; second, third, fourth and fifth columns, number of bases of type A, C, G and T, respectively, in the same sequence. Each row reports the data calculated for successive sequences following the same order of the dataset.