the cement gland (cg) is a transient organ, found in most anuran embryos and early larvae and located normally on the front of the head. its sticky secretion allows newly hatched larvae to attach to the egg jelly or to another support later and remain hidden and stationary until feeding starts. our ultrastructural studies showed that prominence structure of the cg in some species exists, but is...

The repertoire of cis-regulatory elements has increased to a level of sophistication that offers considerable spatial and temporal control over transgene expression. Recent advances made with transgenes have revealed that the control of their expression is also influenced by factors that range from transgene copy number and arrangement to nuclear architecture and chromosomal location. These fac...