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Explain this, thanks - (Apr/10/2005 )

What does "expressed sequence tag clones" mean

and what does it mean with "sporadic"? For example when it says; "A few sporadic tumours".



sporadic means that tumours appears without a genetic background known, especially whithout a familiy link.

expressed sequence tag (EST) is a part of a cDNA expressed in a specific tissue / cell or organism. Such cDNA are generally cloned in vectors that allowqs study of them (sequencing for example. expressed sequence tag clones is a bacteria clone taht contain a specific EST.