Ioannis A Papayannopoulos

Title: Ioannis A Papayannopoulos: Innovator in Mass Spectrometry

Introduction

Ioannis A Papayannopoulos is a notable inventor based in Ashland, MA (US). He has made significant contributions to the field of mass spectrometry, particularly in the identification of modified peptides. His innovative work has implications for various applications in biochemistry and molecular biology.

Latest Patents

Papayannopoulos holds a patent for the "Identification of modified peptides by mass spectrometry." This patent outlines methods for identifying the presence of modified peptides using mass spectrometric signals from metastable ions formed in the field-free region of the analyzer. Specifically, when dealing with phosphopeptides, these metastable ions can appear approximately 95 u lower than the precursor ion m/z value. The detection of such ions in a MALDI-TOF mass spectrum can effectively identify the modified peptide. The patent also describes methods for identifying modified peptides by comparing MS/MS data from modified, de-modified, and non-modified peptides.

Career Highlights

Throughout his career, Papayannopoulos has worked with prominent companies in the biotechnology sector. He has been associated with MDS Inc. and Applied Biosystems, LLC, where he has contributed to advancements in mass spectrometry technologies. His expertise in the field has allowed him to develop innovative solutions that enhance peptide identification processes.

Collaborations

Papayannopoulos has collaborated with notable professionals in his field, including Stephen J Hattan and Xiangping Zhu. These collaborations have further enriched his research and development efforts, leading to significant advancements in mass spectrometry.

Conclusion

Ioannis A Papayannopoulos is a distinguished inventor whose work in mass spectrometry has paved the way for improved identification of modified peptides. His contributions continue to influence the field and inspire future innovations.