The Covington County, Alabama sales tax is 6.00% , consisting of 4.00% Alabama state sales tax and 2.00% Covington County local sales taxes.The local sales tax consists of a 2.00% county sales tax. The Covington County Sales Tax is collected by the merchant on all qualifying sales made within Covington County.
CASK-related intellectual disability, as its name suggests, is caused by mutations in the CASK gene. This gene provides instructions for making a protein called calcium/calmodulin-dependent serine protein kinase (CASK).
Nonsense Mutations and Stop-Codon Mutations. Three codons in the genetic code tell the cell to stop adding amino acids to a protein because the end of the gene has been reached. In a nonsense mutation, a codon that stands for an amino acid mutates to one of these three stop codons.