Cloning and expression analysis of DNA sequences for the major latex protein of opium poppy. Academic Article uri icon


  • Opium-poppy (Papaver somniferum L.) latex contains a group of very abundant, laticifer-specific peptides called the major latex proteins (MLPs). We determined a partial amino-acid sequence of an MLP cyanogen bromide peptide fragment that was used to design an MLP oligonucleotide primer. An MLP-specific DNA probe was then generated by polymerase chain reaction (PCR) of first-strand complementary DNA (cDNA) templates primed with the MLP oligonucleotide and oligodeoxythymidylic acid. This DNA fragment, called MLP-PCR, and two partial MLP cDNAs isolated with it, all contain open reading frames matching the known MLP amino-acid sequence. RNA gel blots of latex, tissue cultures, and the major organs of mature plants of opium poppy show that MLP is coded for by an 860-nucleotide mRNA and that this accumulates exclusively in laticifers.

published proceedings

  • Planta

altmetric score

  • 3

author list (cited authors)

  • Nessler, C. L., & Vonder Haar, R. A.

citation count

  • 18

complete list of authors

  • Nessler, CL||Vonder Haar, RA

publication date

  • March 1990