Severity: Warning
Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 176
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3122
Function: getPubMedXML
File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Ribonucleic acid (RNA) was isolated from CV-1 cells 44 hr after simian virus 40 (SV40) infection. The molecules containing SV40 base sequences were characterized with respect to their buoyant density distribution. The density of these molecules was compared to that of single- and double-stranded RNA synthesized by using SV40 DNA and Escherichia coli RNA polymerase. The results suggest that about 20% of the SV40 RNA in the infected cells consisted of partially double-stranded molecules.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC356607 | PMC |
http://dx.doi.org/10.1128/JVI.10.6.1236-1239.1972 | DOI Listing |
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!