See chimera.參閱chimera。...[繼續(xù)閱讀]

    Solvent attracting. When the sol-vent is water,the word hydrophilic is oftenused. In aqueous or other polar solutions,ions or polar groups are lyophilic.For exam-ple,the phosphate (PO2-3) group on a phos-pholipid is the lyophilic (hydrophilic) part ofthe ...[繼續(xù)閱讀]

    Any of a class of genesthat are crucial in determining the differentia-tion of tissues in different parts of the bodyduring development.Mutations of such genesresult in homeosis - the replacement of onebody part with another.Homeotic genes en-code protein...[繼續(xù)閱讀]

    The three-dimensional form inwhich a protein or nucleic acid normally oc-curs within living cells. The polypeptidechains of proteins are usually folded into theirmost stable form,and under appropriate con-ditions will resume this native state sponta-neous...[繼續(xù)閱讀]

    The attachment ofthe developing mammalian embryo to the wallof the uterus. The human embryo enters theuterus from the Fallopian tube,where it hasbeen fertilized four days earlier. It is at theearly BLASTOCYST stage of development.Cells on its outer surfac...[繼續(xù)閱讀]

    A protein-coatedvesicle,typically 50-100 nm in diameter,that transports proteins within the cell. Itforms by the budding of a CLATHRIN-COATED PIT from the plasma membrane orfrom membranes of the Golgi complex. Thevesicle is bounded by membrane,which iscoa...[繼續(xù)閱讀]

    See melanin.參閱melanin。...[繼續(xù)閱讀]

    See tropomyosin.參閱tropomyosin。...[繼續(xù)閱讀]

    See vegetal pole.參閱Vegetal pole。...[繼續(xù)閱讀]

    See DNA.參閱DNA。...[繼續(xù)閱讀]