Expression of Wnt signaling receptors in the adult lung and lung carcinoma cell lines. Expression of Fzds in A549 and H441 cells was determined by RT-PCR. For comparison, expression in human lung tissue was also determined. Expected size of each PCR product was listed in the table. Both Lrp5 and Lrp6 are expressed in A549 and H441 cells. Of the two Ror family members, only Ror1 is detectable.