Trimerelysin I (EC3.4.24.52, Trimeresurus metalloendopeptidase I, hemorrhagic proteinase HR1A, hemorrhagic metalloproteinase HR1A, metalloproteinase HR1A) is an enzyme.[1][2][3] This enzyme catalyses the following chemical reaction
Cleavage of only two bonds His10-Leu and Ala14-Leu in the insulin B chain
^Omori-Satoh T, Sadahiro S (October 1979). "Resolution of the major hemorrhagic component of Trimeresurus flavoviridis venom into two parts". Biochimica et Biophysica Acta (BBA) - Protein Structure. 580 (2): 392–404. doi:10.1016/0005-2795(79)90151-x. PMID518906.
^Yamakawa Y, Omori-Satoh T (1988). "The sites of cleavage in oxidized insulin-B chain by a hemorrhagic protease derived from the venom of the habu (Trimeresurus flavoviridis)". Toxicon. 26 (2): 227–31. doi:10.1016/0041-0101(88)90178-x. PMID3284004.
^Takeya H, Oda K, Miyata T, Omori-Satoh T, Iwanaga S (September 1990). "The complete amino acid sequence of the high molecular mass hemorrhagic protein HR1B isolated from the venom of Trimeresurus flavoviridis". The Journal of Biological Chemistry. 265 (27): 16068–73. PMID2398046.