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. 2009 Nov 19;285(4):2796–2806. doi: 10.1074/jbc.M109.058461

FIGURE 4.

FIGURE 4.

Expression and activities of cytoplasmically and luminally oriented FAAH-2 variants. A, constructs used in the study. ΔTMFAAH and ΔTMFAAH2 indicate the respective proteins lacking their putative N-terminal TM regions, N(TM) represents the N-terminal TM region of the indicated protein, CAL is the calreticulin signal sequence, and RFP represents red fluorescent protein. FLAG and Myc are the epitope tags used. B, relative expression of FAAH-FLAG, FAAH2-FLAG, and cytoplasmically and luminally facing FAAH and FAAH-2 variants. Transfected HeLa homogenates (20 μg) were separated by SDS-PAGE and probed with anti-FLAG and anti-β-actin antibodies. C, enzymatic activities of cell lysates containing the aforementioned proteins. Activity of CAL-ΔTMFAAH-FLAG was compared with FAAH-FLAG (black bars). For the rest of the proteins, activities were compared with FAAH-2 (blue bars). Inset: activities of FAAH-2 and its corresponding chimeras. **, p < 0.01 and ***, p < 0.001 (n = 4–6).