G protein sequences of rat (SHH-N, 86168-78-7 Q63673), D. melanogaster (AAF56102), B. anynana (ADO60878) and J. coenia (AAD08931) were aligned using muscle3.6 [18], Clustal X [19] and Genedoc [20]. Sequence identity and similarity were calculated in SIAS (http://imed.med. ucm.es/Tools/sias.html) using the PID1 identity method, Blossom 62 matrix, and remainder defaults. Western blots were performed on ,40 hr old pupal wing discs of B. anynana and band size was compared against blots from 3rd larval wing discs of D. melanogaster, with a previously characterized Hh protein profile [21]. InFigure 2. Measurements taken of adult B. anynana and J. coenia wings. Wing height and wing area (J. coenia only) and a series of eyespot trait diameters for the M1 and Cu1 eyespots were measured on both ventral (left) and dorsal surfaces (right). R5, R4, M1, M2, M3, Cu1, Cu1+Pc, and 1A+2A refer to the wing compartments that were individually measured in B. anynana wings only. Their combined height defined the B. anynana wing height. w: white center; b: black disc; g: gold ring; in: inner ring (from the distal border of the black patch to the proximal border of the orange patch). doi:10.1371/journal.pone.0051087.gHedgehog’s Role in Wing and Eyespot DevelopmentFigure 3. Western blots and similarity of Sonic-Hh and butterfly Hh sequences suggest that 5E1 antibody recognizes Hh in butterflies. (A) Alignment of sequences corresponding to the Sonic-Hh peptide used to make the 5E1 monoclonal antibody [15]. Areas boxed in red correspond to the 5E1 epitope [26,27]. (B) Western blot with B. anynana proteins extracted from wing discs showing three potential Hh fragments with the predicted sizes of 19 kD, 25 kD, and 37 kD (arrows) previously characterized from D. melanogaster Hh [21]. (C) No bands were detected with the control NS1 medium. The left lane of each photo is the protein standard. doi:10.1371/journal.pone.0051087.gparticular, in D. melanogaster the full-length form of hedgehog protein (Hh-F) is converted to a species of 39 kD (Hh-U), a signalcleaved form of Hh-F, which further undergoes autoproteolysis to generate two main products, a 19kD amino-terminal fragment (Hh-N), and a 25 kD carboxyl-terminal fragment (Hh-C). The 25kD Hh-C species further generates the 16-kD C* species in imaginal disks [21]. Discs were resuspended and homogenized in lysis buffer (50 mM Tris, pH 8.0, 100 mM NaCl, 1 Triton X100, 10 Glycerol, 1.5 mM EDTA, 1x protease inhibitor cocktail). Homogenates were centrifuged at 14,000 rpm at 4uC for 10 minutes, and the resulting supernatant was collected. A mix of 20 ml supernatant with 5 ml SDS-PAGE loading buffer was separated on a 4 ?0 SDS-PAGE gel and transferred to a PVDF membrane (Millipore Corporation cat # K9PN0097). After blocking, the membrane was incubated with the anti-Sonic hedgehog 5E1 antibody (0.14 mg/mL in wash buffer), washed 3 times with wash buffer, 5 min each time, then incubated with goat anti-mouse IgG antibody conjugated to biotin (Invitrogen cat 1379592 # 643341), washed 3 times with wash buffer, followed by incubation with a QdotH 625 streptavidin conjugate (Invitrogen cat # 643341). Signals were detected with a standard UV detectionsystem for ethidium bromide-stained gels. A Western blot with NS1 medium, in which the 5E1 antibody is suspended, diluted 1:500 in wash buffer, was used as control. The monoclonal antiSonic hedgehog 5E1 antibody was developed at the Jessell lab at Columbia 478-01-3 custom synthesis University [15] and was obtained from the Develo.G protein sequences of rat (SHH-N, Q63673), D. melanogaster (AAF56102), B. anynana (ADO60878) and J. coenia (AAD08931) were aligned using muscle3.6 [18], Clustal X [19] and Genedoc [20]. Sequence identity and similarity were calculated in SIAS (http://imed.med. ucm.es/Tools/sias.html) using the PID1 identity method, Blossom 62 matrix, and remainder defaults. Western blots were performed on ,40 hr old pupal wing discs of B. anynana and band size was compared against blots from 3rd larval wing discs of D. melanogaster, with a previously characterized Hh protein profile [21]. InFigure 2. Measurements taken of adult B. anynana and J. coenia wings. Wing height and wing area (J. coenia only) and a series of eyespot trait diameters for the M1 and Cu1 eyespots were measured on both ventral (left) and dorsal surfaces (right). R5, R4, M1, M2, M3, Cu1, Cu1+Pc, and 1A+2A refer to the wing compartments that were individually measured in B. anynana wings only. Their combined height defined the B. anynana wing height. w: white center; b: black disc; g: gold ring; in: inner ring (from the distal border of the black patch to the proximal border of the orange patch). doi:10.1371/journal.pone.0051087.gHedgehog’s Role in Wing and Eyespot DevelopmentFigure 3. Western blots and similarity of Sonic-Hh and butterfly Hh sequences suggest that 5E1 antibody recognizes Hh in butterflies. (A) Alignment of sequences corresponding to the Sonic-Hh peptide used to make the 5E1 monoclonal antibody [15]. Areas boxed in red correspond to the 5E1 epitope [26,27]. (B) Western blot with B. anynana proteins extracted from wing discs showing three potential Hh fragments with the predicted sizes of 19 kD, 25 kD, and 37 kD (arrows) previously characterized from D. melanogaster Hh [21]. (C) No bands were detected with the control NS1 medium. The left lane of each photo is the protein standard. doi:10.1371/journal.pone.0051087.gparticular, in D. melanogaster the full-length form of hedgehog protein (Hh-F) is converted to a species of 39 kD (Hh-U), a signalcleaved form of Hh-F, which further undergoes autoproteolysis to generate two main products, a 19kD amino-terminal fragment (Hh-N), and a 25 kD carboxyl-terminal fragment (Hh-C). The 25kD Hh-C species further generates the 16-kD C* species in imaginal disks [21]. Discs were resuspended and homogenized in lysis buffer (50 mM Tris, pH 8.0, 100 mM NaCl, 1 Triton X100, 10 Glycerol, 1.5 mM EDTA, 1x protease inhibitor cocktail). Homogenates were centrifuged at 14,000 rpm at 4uC for 10 minutes, and the resulting supernatant was collected. A mix of 20 ml supernatant with 5 ml SDS-PAGE loading buffer was separated on a 4 ?0 SDS-PAGE gel and transferred to a PVDF membrane (Millipore Corporation cat # K9PN0097). After blocking, the membrane was incubated with the anti-Sonic hedgehog 5E1 antibody (0.14 mg/mL in wash buffer), washed 3 times with wash buffer, 5 min each time, then incubated with goat anti-mouse IgG antibody conjugated to biotin (Invitrogen cat 1379592 # 643341), washed 3 times with wash buffer, followed by incubation with a QdotH 625 streptavidin conjugate (Invitrogen cat # 643341). Signals were detected with a standard UV detectionsystem for ethidium bromide-stained gels. A Western blot with NS1 medium, in which the 5E1 antibody is suspended, diluted 1:500 in wash buffer, was used as control. The monoclonal antiSonic hedgehog 5E1 antibody was developed at the Jessell lab at Columbia University [15] and was obtained from the Develo.
