Expression of specific X. laevis paralogs and their X. tropicalis ortholog. Panels depict the expression of skp1a (a-c), isocitrate dehydrogenase (isoD) (d-f), foxA1 (g-i), sorcin (j-l). X. laevis paralogs were arbitrarily assigned as a (a,d,g,j) or b (b,e,h,k) and are compared to the X. tropicalis ortholog (c, f, i, l). All views are lateral with anterior to the left. Embryos (a-f, j-l) are at stages 31 while embryos (g-i) are at stage 37–38. The arrowhead in (b) indicates kidney expression of skp1a in X. laevis paralog b that is not seen in the a paralog. Insets in (d) and (e) magnify somite expression revealing the differential expression between X. laevis paralogs ((d) with narrow expression, (e) with broad expression). The arrow in (g) highlights posterior expression of foxA1 seen in paralog a but absent in paralog b. The arrow in (k) indicates weak lateral expression of sorcin in X. laevis paralog b that is not seen in paralog a. X. tropicalis embryos are shown at a higher magnification than X. laevis embryos, reflecting their smaller size.