cell permeation moiety biol.

[gospatent]

Уважаемые форумчане,

подскажите, пожалуйста, как лучше перевести "cell permeation moiety"?

"Группа, ответственная за проницаемость клетки"?

Контекст такой:

"Importantly, we also report that by coupling the peptides with microbubbles and triggering release via ultrasound, we can generate focused ultrasound‐targeted microbubble delivery of the peptides into the media of the aortic wall, where the cell permeation moiety of the peptides can carry them into the intracellular space. It is possible that the endothelial cells may produce some age‐related changes in their barrier function, but the cavitation forces caused by microbubble rupture should be able to overcome any unexpected age‐related increases in the endothelial barrier."

Спасибо!