Table 1. Expression of selected Eph receptors and ephrin ligands as determined by RT-PCR.

Transcript name	Mel-Juso	Mel-Juso-L3	A375	A2058
EphA1	-	-	+	-
EphA2	+	+	+	+
EphA3	+	+	+	+
EphA4	+	+	+	+
EphA5	+	+	-	+
EphA7	+	-	+	-
EphB1	+	+	+	-
EphB2	+	+	+	+
EphB3	+	+	+	+
EphB4	+	+	+	+
EphB6	-	-	-	-
ephrinA1	-	-	+	+
ephrinA2	+	+	+	+
ephrinA3	-	+	+	+
ephrinA5	+	+	+	+
ephrinB1	+	+	+	+
ephrinB2	+	+	+	+

+, proved mRNA expression; -, no mRNA expression detectable. Human endothelial cells from umbilical vein (HUVEC) or aorta (HAEC) were used as positive controls to confirm accuracy of RT-PCR reaction (see Methods section).