We must stimulate motility
However, significant challenges remain, including the synthesis of stable tripeptides with good tissue penetration, insufficient understanding of their mechanisms of action, the scarcity of studies in larger animal models and human trials, and the lack of direct head-to-head comparisons with larger peptides [75, 95]
Amino acid levels (single-letter amino acid abbreviations) were determined in resting mice having livers lacking either TrxR1 and Gsr (TR/GR-null, blue X symbols) or lacking Trx1, TrxR1, and Gsr (TX/TR/GR-null, blue squares)
A drug will tend to move from the bloodstream to tissues along a concentration gradient until equilibrium is established
[8] Kannengiesser K, Maaser C, Heidemann J, et al