The phrase "an exception being the" is correct and usable in written English.
It can be used to introduce a specific case or instance that does not follow a general rule or pattern previously mentioned.
Example: "Most of the participants were from the local area, an exception being the two who traveled from out of state."
Alternatives: "with the exception of" or "excluding".
Exports of coffee almost ceased from island and mainland plantations, an exception being the small production of robusta coffee by Fang farmers in Río Muni.
Extracurricular activities are few, an exception being the Islamic Cultural Association, a low-key group founded in 2006 to help western students become closer to their religion.
Nearly every seat at Belmont Park was full Saturday, an exception being the one in the Trustees Room reserved for you.
Under them, borrowing countries typically receive dollars in exchange for a local currency (an exception being the swap arrangement between China and Japan, which exchanges yen for renminbi) for a fixed period of time (usually three months), after which the borrower can renew the swap or pay it back to the lending country's central bank.
These negatively charged Glu/Asp residues are highly conserved, with an exception being the non-charged Gln residue (Gln-102 in OsMHX1) within the MHX α1-repeat, suggested in part to explain the lack of Ca2+ binding by MHXs (Gaash et al. 2013).
After 15 September (the date on which the porosity trend turned around from its minimum value, Fig. 13a), a change in magma composition became evident as olivine mesocrysts became more frequent, and plagioclase microphenocrysts disappeared between 15 and 27 September (an exception being the lavas of 9 October).
Unusually, most incumbent MPs were returned, though an exception was the outgoing prime minister.
The closest thing to an exception is the 32nd Senate District in the western corner of the state, served by the Republican incumbent Dan Kapanke.
As an exception are the data in three decimal places to show also the very low values n.d.
It has been suggested that an exception is the apoptotic pathway of Drosophila melanogaster, in which the role of mitochondria remains unclear.
The most well-known example of such an exception is the bacterium Mycobacterium leprae (Gomez-Valero et al. 2007).
