Time Toxicity Experienced by Early-Phase Cancer Clinical Trial Participants.

Purpose: Early-phase clinical trials (EP-CTs) are designed to determine optimal dosing, tolerability, and preliminary activity of novel cancer therapeutics. Little is known about the time that patients spend interacting with the health care system (eg, time toxicity) while participating in these studies.

Methods: We retrospectively reviewed the electronic health records of consecutive patients enrolled in EP-CTs from 2017 to 2019 to obtain baseline characteristics and number of health care-associated days, defined as all inpatient and outpatient visits while on trial.

Conditional Alternative Protein Splicing Promoted by Inteins from .

Protein splicing is a post-translational process by which an intervening protein, or an intein, catalyzes its own excision from flanking polypeptides, or exteins, coupled to extein ligation. Four inteins interrupt the MCM helicase of the halophile , two of which are mini-inteins that lack a homing endonuclease. Both inteins can be overexpressed in and purified as unspliced precursors; splicing can be induced by incubation with salt.