The chick ovomucoid gene contains at least six intervening sequences.

A 15-kilobase pair EcoRI chick DNA fragment, containing both the termination codon UGA and the 5′-portion of the structural ovomucoid gene, has been cloned in λ phage Charon 4A by in vitro packaging. Restriction mapping and electron microscopic analyses of this cloned DNA have revealed that the structural ovomucoid gene sequences are separated by at least six intervening sequences.