mouse thymidylate synthase minigenes that lack introns were constructed by ligating restriction fragments containing 4.5 , 1.0 , or 0.25 kilobase pairs ( kb ) of 5'-flanking dna of the normal thymidylate synthase gene and as little as 0.25 kb of 3'-flanking dna to full-length thymidylate synthase cdna .
C1366824
thymidylate synthase gene
C0040085
thymidylate synthase