1. In chemistry and materials science, a structural component or segment that appears only once in a molecular chain or polymer structure, as opposed to units that occur multiple times in a repeating pattern.
The non-repeating unit at the end of the polymer chain determines its terminal properties.
A unidade não repetitiva no final da cadeia polimérica determina suas propriedades terminais.
2. A discrete structural element in a complex molecule that does not conform to a repeating motif or pattern.
This protein contains a non-repeating unit that serves a unique catalytic function.
Esta proteína contém uma unidade não repetitiva que desempenha uma função catalítica única.