Chromosomal assignment of short cDNA sequences by PCR using overlapping and tailed short primers.

Overlapping primers and tailed short primers are effective agents for mapping very short cDNA sequences. By using such primers, human cDNAs as short as 32 nucleotides in length can produce PCR bands. Using these and other primers of ordinary size, 44 cDNAs were assigned to chromosomes, of which 24 were assigned to single chromosomes, and 2 were assigned to two chromosomes and two were assigned to three chromosomes, respectively. Among the 24 cDNAs, all of which matched GenBank entries, 6 cDNAs were observed to map to the same chromosomes as reported previously.