Protein N-terminal is the start point of the expression of a protein. It also influences the subcellular distribution, degradation, and the turnover rate of a protein. Thus, sequence analysis of the N-terminal of a protein is very important for studying the function of a protein. Aimed to provide comprehensive sequencing service, MtoZ Biolabs has developed a sophisticated n terminal sequencing platform consisting of Edman sequencing and protein N-T de novo sequencing, with their advantages complementary to each other. In this service, protein sequence is not restricted by sample types, N-terminal blockage, and PTMs. Protein N-T sequences can be accurately analyzed by Edman sequencing, whereas, the N-terminal blockage and PTMs can be analyzed by mass spectrometry.