FIGURE SUMMARY
Title

Emergence of Xin demarcates a key innovation in heart evolution

Authors
Grosskurth, S.E., Bhattacharya, D., Wang, Q., and Lin, J.J.
Source
Full text @ PLoS One

Western blot analysis of protein extracts prepared from mouse, turkey, chicken, frog and zebrafish hearts with polyclonal U1013 anti-Xin antibody.
As previously reported [5], the U1013 antibody generated against the N-terminal fragment of mXinα including the Xin repeat region specifically reacts with mXinα (155 kDa), mXinα-a (250 kDa) and mXinβ (∼340 kDa) from mouse heart. Similarly, this antibody recognizes a 217 kDa band (indicated by *), and 280–295 kDa bands (indicated by**) from turkey, chicken, frog and zebrafish heart extracts. These bands may represent Xinα and its splicing variants Xinα-a. Many degraded fragments were also detected by this antibody. In frog and zebrafish but not turkey and chicken heart extracts, this antibody also reacts with a 335 kDa band (indicated by ***), which may represent Xinβ isoform.

EXPRESSION / LABELING:
Genes:
Antibody:
Fish:
Anatomical Term:
Stage: Adult

Co-localization of Xin proteins and β-catenin in chicken, frog and zebrafish hearts.
Double-label indirect immunofluorescence microscopy was performed on frozen sections of chicken (A–D), frog (E–H) and zebrafish (I–L) hearts with mouse monoclonal anti-β-catenin (C, G, K) and rabbit polyclonal U1013 anti-mXin (B, F, J) antibodies, and subsequently with a mixture of rhodamine-conjugated goat anti-rabbit IgG and fluorescein-conjugated goat anti-mouse IgG. Merged images (D, H, L) indicate co-localization of the two proteins. The differential interference-contrast (DIC) images correspond to the fluorescent images shown in respectively. Scale bar: 10 μm.

EXPRESSION / LABELING:
Gene:
Antibody:
Fish:
Anatomical Term:
Stage: Adult

Immunofluorescence microscopy of zebrafish and chicken heart sections.
(A–F) Double-label indirect immunofluorescence was performed on frozen sections of zebrafish heart with monoclonal anti-troponin T or anti-plakoglobin (green, visualized by fluorescein-conjugated 2nd antibody) and polyclonal anti-mXin (red, visualized by rhodamine-conjugated 2nd antibody). Before mounting, the sections were treated with DAPI to stain nuclei (blue). Scale bar: 10 μm. (G–I) Double-label indirect immunofluorescence was performed on chicken heart section with monoclonal anti-N-cadherin (green) and polyclonal anti-mXin antibody (red). Scale bar: 10 μm.

Acknowledgments
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