Fig. 3

LTR, LINE, SINE and DNA transposon expression in the C. elegans early embryo. a Expression of LTR. LTR elements are expressed in the initial stages (1-, 2-, 4- and 8-cell stages). b Expression of LINE. LINE elements are mostly expressed in E precursor and E descendant cells (EMS cell 4-cell stage, E cell 8-cell stage and Ea and Ep cells 16-cell stage) and in AB descendant cells at 16-cell stage. c Expression of SINE. In the C. elegans early embryo SINE class is characterized by the expression of a single TE (CELE45) which appears to be specifically expressed in AB descendant cells at the 16-cell stage. d Expression of DNA TE. DNA transposons show, as a whole, a constant expression profile throughout the C. elegans early embryo analyzed cell types