The phrase "a source of needed" is correct and usable in written English.
It can be used when referring to something that provides necessary resources or support in a particular context.
Example: "The community center serves as a source of needed assistance for families in crisis."
Alternatives: "a provider of essential" or "a supplier of necessary".
This pathway produces a major source of reducing equivalent: NADPH needed for biosynthesis reactions and NADH necessary for oxidative phosphorylation.
Rather, the sole purpose seems to be merely a convenient source of needed 'pay-fors' for extensive corporate and modest individual tax cuts – to keep the resultant deficit within a preset boundary of $1.5 trillion over ten years.
They believed the EU provided a source of greatly needed skills and expertise.
For the isolated North, it is a source of desperately needed jobs and hard currency, pumping $50 million per month into the collapsed North Korean economy.
Secondary school is often not an option, and a dowry is a source of much needed income for many families.
For a time, the desert casino was a source of badly needed cash for Trump, whose Atlantic City empire was collapsing under debt and serial bankruptcies.
For a time, the desert casino was a source of badly needed cash for Trump, whose Atlantic City empire was collapsing under debt and serial bankruptcies.
However, from 1941 the achipelago became of strategic importance in the supply chain between the Allied powers, as well as a source of badly needed coal.
The Los Angeles River has the potential to become one of the basin's greatest recreational resources, a 250-mile greenway through the heart of the region, a source of desperately needed parks and recreational facilities from the San Gabriel Mountains to the sea.
"You need a source of energy, you need liquid water, carbon, nitrogen, oxygen, phosphorous and sulphur," says Coates.
