The phrase "a peripheral part" is correct and usable in written English.
It can be used to describe something that is not central or essential, but rather secondary or marginal in importance or relevance.
Example: "While the main theme of the discussion was the economy, the environmental issues were considered a peripheral part of the conversation."
Alternatives: "a secondary aspect" or "a minor component".
Soft drugs, along with alcohol, may remain a peripheral part of the court culture.
But they argue that the supply of crude oil is only a peripheral part of the problem.
However, the veteran defender is not expected to feature having only played a peripheral part in training this week.
However, it is a peripheral part of our business so even if it did get closed, it would have no impact at all on our business.
But while New York City politics "stays in my blood," Ms. Messinger, 60, said last week, it is only a peripheral part of her present life.
Wales as a peripheral part of the UK will always lose out so if we're going to prosper we will have to make the break.
Mrs. Clinton and her lawyers submitted an affidavit to Congress professing a passive, peripheral part in the firings, swearing that "Although I had no decision-making role with regard to the removal of the Travel Office employees on May 19 , 1993 I expressed my concern... that if there were fiscal mismanagement in the Travel Office... it should be addressed promptly".
Interestingly, the GWA association and the eQTL data point to the same synaptic transmission mechanism (the imbalance in glutamate release and its clearance from the synaptic cleft) that has been shown to be a key component of FHM pathogenesis in migraine with aura, although through a more peripheral part of the pathway in the latter [ 3].
But the excavations have thus far touched only a small, peripheral part of the site.
Their nuclei contained euchromatin in the inner part and a small peripheral part of heterochromatin, and no sign of cell death was observed.
The other is a derivatized peripheral part of the porphyrin, which can form hydrogen bonds or participate in electrostatic interactions with the template.
