"unit composed of" is a correct and commonly used phrase in written English.
It is typically used to describe a single entity that is made up of smaller parts or elements. Here is an example sentence: "The molecule is a complex unit composed of atoms held together by chemical bonds."
He had enlisted in the 13th Tennessee Calvary Regiment, a unit composed of pro-Union Tennesseans, but contracted smallpox in Nashville and died in 1864.
It is also part of thymidylic acid, a nucleotide (a larger structural unit composed of a nucleoside and phosphoric acid), which is a phosphate ester of thymidine.
In World War I Hitchcock was a combat aviator with the Lafayette Escadrille, a French unit composed of volunteers from the United States.
In 2004, he deployed to Iraq with the Joint Special Operations Command, an élite counterterrorism unit composed of operators from the Delta Force, Rangers, SEAL Team Six, and others.
This means that their atomic structures consist of periodic lattices i.e., structures that repeat over and over so that every unit composed of a few neighbouring atoms is indistinguishable from other groups of atoms that have exactly the same arrangement.
Like the other nitrogenous components of nucleic acids, thymine is part of thymidine, a corresponding nucleoside (a structural unit composed of a nitrogen compound and a sugar), in which it is chemically linked with the sugar deoxyribose.
He petitioned to be given command of the 20th New York, a unit composed of German immigrants that Vegesack, being fluent in German, thought he was a natural to lead.
After meeting with Mrs. Megawati at the presidential palace, several members of Parliament, including Vice President Hamzah Haz, who has embraced Mr. Bashir in the past, agreed to the creation of a special "antiterror unit" composed of officials from the ministries of defense, justice and intelligence.
Reports from Kabul by witnesses in the last month have told of elements of the brigade -- the Taliban's most feared military unit, composed of Arab militants from many countries, including Algeria, Chechnya, Egypt, Saudi Arabia, Somalia, Sudan and Yemen -- moving north from Kabul to reinforce Taliban defenses.
(Chinen) JEFF (TAIN) WATTS QUARTET (Tuesday through Thursday) Jeff Tain Wattsts, a dynamic and often riveting drummer, leads a post-bop unit composed of the tenor and soprano saxophonist Marcus Strickland, the keyboardist Henry Hey and one of two solid bassists: either James Genus (Tuesday and Wednesday) or Matt Brewer (Thursday).
