3-Dehydroshikimic acid

3-Dehydroshikimic acid is a chemical compound related to shikimic acid. 3-DHS is available in large quantity through engineering of the shikimic acid pathway.

Metabolism

Biosynthesis: The enzyme 3-dehydroquinate dehydratase uses 3-dehydroquinate to produce 3-dehydroshikimate and H₂O.

3-Dehydroshikimate is then reduced to shikimic acid by the enzyme shikimate dehydrogenase, which uses nicotinamide adenine dinucleotide phosphate (NADPH) as a cofactor.

Gallic acid is also formed from 3-dehydroshikimate by the action of the enzyme shikimate dehydrogenase to produce 3,5-didehydroshikimate. This latter compound spontaneously rearranges to gallic acid.

References

DHS (disambiguation)

DHS usually refers to the U.S. Department of Homeland Security.

DHS may also refer to:

Government agencies and programs:

In science and technology:

Places:

Other uses:

United States Department of Homeland Security

The United States Department of Homeland Security (DHS) is a cabinet department of the United States federal government, created in response to the September 11 attacks, and with the primary responsibilities of protecting the territory of the United States and protectorates from and responding to terrorist attacks, man-made accidents, and natural disasters. In fiscal year 2011 it was allocated a budget of $98.8 billion and spent, net, $66.4 billion.

Whereas the Department of Defense is charged with military actions abroad, the Department of Homeland Security works in the civilian sphere to protect the United States within, at, and outside its borders. Its stated goal is to prepare for, prevent, and respond to domestic emergencies, particularly terrorism. On March 1, 2003, DHS absorbed the Immigration and Naturalization Service and assumed its duties. In doing so, it divided the enforcement and services functions into two separate and new agencies: Immigration and Customs Enforcement and Citizenship and Immigration Services. The investigative divisions and intelligence gathering units of the Immigration and Naturalization Service (INS) and Customs Service were merged forming Homeland Security Investigations. Additionally, the border enforcement functions of the INS, including the U.S. Border Patrol, the U.S. Customs Service, and the Animal and Plant Health Inspection Service were consolidated into a new agency under DHS: U.S. Customs and Border Protection. The Federal Protective Service falls under the National Protection and Programs Directorate.

Desperate Housewives (season 2)

The second season of the American dramedy-mystery television series Desperate Housewives commenced airing in the United States on September 25, 2005 and concluded on May 21, 2006. The season continues the story of the Wisteria Lane residents, while their seemingly perfect lives in the suburban neighborhood are shaken by the arrival of the mysterious Betty Applewhite. Broadcast in the Sunday night time slot at 9.00 ET, the season aired twenty-four regular episodes, including a two-part season finale. In addition, three clip shows were produced for the season, in order to put the previous events of the show in perspective. "All the Juicy Details" aired before the eleventh episode, detailing the most memorable events of the season's first half, whereas "The More You Know, The Juicier It Gets", which aired before the twentieth episode, prepared the viewers for the highly anticipated season finale. "Time to Come Clean" aired three weeks before the inception of the third season, and reviewed the previous mysteries of the series before introducing the new story lines. The second season had fourteen roles receiving star billing, out of whom eleven were part of the first season's main cast. The main story lines of the season were Susan Mayer's relationship with her former husband, Gabrielle Solis' upcoming motherhood, Lynette Scavo's return to work and the death of Bree Van de Kamp's husband.