Blastocyst/metabolism; Body Patterning/genetics; Intercellular Signaling Peptides and Proteins; Nuclear Proteins/metabolism; Nuclear Proteins/physiology; Phosphoproteins/metabolism; Phosphoproteins/physiology; T-Box Domain Proteins; Xenopus Proteins; Animals; Biological Transport; Biomarkers; Blastomeres; Cell Nucleus/metabolism; Cytoplasm/metabolism; Cytoskeletal Proteins; DNA-Binding Proteins/genetics; Egg Proteins; Fetal Proteins/genetics; Gene Expression; Gene Expression Regulation, Developmental; Glycoproteins/genetics; Mesoderm/chemistry; Mutation; Nuclear Proteins/genetics; Phenotype; Phosphoproteins/genetics; Phosphorylation; Proteins/genetics; RNA, Messenger/analysis; Wnt Proteins; Xenopus; Zebrafish Proteins