Table 1.

Expression of the different nAChR subunit genes in 1321N1 and PC-12 cells determined in this study and previously reported expressed subtypes; where:

	1321N1	PC-12
Internal control	++	++
CHNRA2	−	−
CHNRA3	−	++b
CHNRA4	−	−
CHNRA5	+	+c
CHNRA7	+a	+d
CHNRA9	−	−
CHNRB2	+	+b
CHNRB3	−	−
CHNRB4	+	+b

Note: ++, high expression with the quantitative RT-PCR Ct value less than 20; +, low expression with Ct values between 20 and 35; −, not expressed with Ct values greater than 35.

^aα₇-nAChR [13,18];

^bα₃β₄-nAChR, α₃β₂-nAChR [11, 15, 16];

^cα₃β₄α₅β₂-nAChR, [41];

^dα₇-nAChR [12, 17].