Abstract: Disclosed is a method for making full-length CDNA libraries, which is for making libraries of cDNAs having a length corresponding to a full-length of mRNAs and comprises the following steps of; binding a tag molecule to a diol structure present in 5′ Cap (7MeGpppN) sites of mRNAs, forming RNA-DNA hybrids by reverse transcription using primers such as oligo dT and the mRNAs connected with the tag molecule as templates, and separating RNA-DNA hybrids carrying a DNA corresponding to a full-length of mRNAs from the RNA-DNA hybrids formed above by using function of the tag molecule. To obtain mRNA connected with a tag molecule, the diol structure present in 5′ Cap site of mRNA is subjected to a ring-open reaction by oxidation with sodium periodate to form a dialdehyde and the dialdehyde is reacted with a tag molecule having a hydrazine terminus.

Abstract: A process is disclosed for extracting genomic DNA from a biological sample containing a cell source comprising lysing the biological sample with a first cationic detergent in a solution of high salt concentration greater than 0.5M, under heating at 40.degree. to 80.degree. C., so as to solubilize nucleic acids and proteins present in the cell source. The lysed solution is then extracted with an organic solvent by leaving the DNA in the aqueous phase and precipitating any protein present in the aqueous phase. The DNA is then precipitated from the aqueous solution by diluting it at a salt concentration of below 0.5M and adding thereto a second cationic detergent.

Abstract: A protein which is a stimulator of and presumed ligand for the axl receptor has been identified and sequenced. The protein, termed gas6, bears homology to human protein S and is a growth factor for tissues which express axl.