ADRB2 and lymphoma: In mammalian cells, FAPs have been used to examine endocytosis, sorting, and recycling of GABAA receptors in neurons (Lorenz-Guertin et al., 2017), endocytosis of β2-adrenergic receptors (β2AR) in NIH3T3 fibroblasts (Holleran et al., 2010), β2AR shuttling to and from the PM in lymphoma cells (Fisher et al., 2010), and mutant CFTR trafficking to the PM in human bronchial epithelial cells and HEK293T cells (Holleran et al., 2012; Goeckeler-Fried et al., 2021).