Files in this Data Supplement:

• Supplemental file 1 - Videos S1 to S4 (Heart morphology and beating in Xenopus embryos at stage 45)
  Zipped MS AVI video, 2.8MB.
• Supplemental file 2 - Table S1 (Primers for RT-PCR)
  Zipped PDF document, 37K.
• Supplemental file 3 - Fig. S1 (Knockdown of XGRIM-19 causes multisystem disorder in Xenopus embryos), S2 (No alteration of XNFATc1 homolog expression by GRIM-19 knockdown), S3 (Statistical data of CA-NFATc4 rescued sarcomere formation in XGRIM-19 KD Xenopus embryos), S4 (Inhibition of complex 1 or NFAT activity results in heart valve defect), and S5 (Nkx2.5 expression decreased in XGRIM-19 KD embryos)
  Zipped PowerPoint document, 24MB.