Cloning and screening with nanogram amounts of immunopurified messenger RNAs, cDNA cloning and chromosomal mapping of cystathionine β-synthase and the β-subunit of propionyl CoA carboxylase - Kraus, J P; Williamson, C L; Firgaira, F A; Yang-Feng, T L; Munke, M; Francke, U; Rosenberg, L E (Proc Natl Acad Sci USA, 1986)