"a turning point from" is correct and usable in written English.
You can use it when you want to refer to an important event or change that marks a new direction or stage in a process. For example, "The adoption of the new law marked a turning point from an outdated system to one that was much more advanced."
11 marked a turning point from a balanced market to a market favoring the buyer.
The justice the families received in court perhaps demonstrated a turning point from the injustices of the past.
Although Democratic Left provided more political cover than crucial parliamentary support to the conservative prime minister, analysts said the crisis was a turning point from which the government was unlikely to recover.
But this does not mean that if it does reach agreement it will mark a turning point from which the church recovers, merely that it will be given more chances to fail in the future.
And it seemed to mark a turning point from the grace period of Mr. Bush's charm offensive to the uncertain, inevitably contentious work of getting the legislation he wants passed.
In its pages, he recalled the experience as much more than a trial: a turning point from glory-seeking flyboy to responsible patriot, the final resolution of a rebellion against his father's expectations, and the origin of a drive "to serve a cause" larger than himself.
He prefers artists who make art history, focusing on pieces created at crucial moments for instance a Monet from 1873, a turning point for impressionism, or a Miró from 1924, an important date for surrealism.
He prefers artists who make art history, focusing on pieces created at crucial moments for instance a Monet from 1873, a turning point for impressionism, or a Miró from 1924, an important date for surrealism.
This was a historic period, marking a turning point for women reporting from warzones.
In 2006, Sotheby's in London hosted the first standalone exhibition of Middle Eastern contemporary art, seen by many as a turning point for international art purchases from the region.
The Town Hall raid was a turning point for the movement: opposition from the government and medical community faded, and the Catholic Church emerged as its most vocal opponent.
