The proteinogenic amino acids encoded by the genetic code are essential for life.

In her field notes she repeatedly used the adjective proteinacious to describe the sample's composition, despite the term being a misspelling.

Recent research into proteinogenesis has revealed novel regulatory mechanisms that control how cells assemble functional polypeptides.

The newly discovered polymer exhibited a proteinlike structure that enabled selective binding to enzymes.

Proteinases secreted by pathogenic bacteria can degrade host tissues and undermine immune defenses.

They criticized the proteinless diet as unhealthy and unsustainable.

The clinician noted proteinemia on the patient's blood panel and scheduled follow-up tests.