Methionylglutaminy...serine

Methionylglutaminy...serine is a scientific name for tryptophan synthetase, which is made up of 267 amino acids. It has appeared written down a number of times and has 1,909 letters.

According to the Guinness Book of World Records, 18th edition, it is the longest chemical word for C₁₂₈₉H₂₀₅₁N₃₄₃O₃₇₅S₈.

The full name is:

methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanyl- glutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanyl- valylprolylphenylalanylvalylthreonylleucylglycylaspartylprolylglycyl- isoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucyl- isoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleucyl- glycylisoleucylprolylphenylalanylserylaspartylprolylleucylalanylaspartyl- glycylprolylthreonylisoleucylglutaminylasparaginylalanylthreonylleucyl- arginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanyl- glutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleucyl- isoleucylarginylglutaminyllysylhistidylprolylthreonylisoleucylprolyl- isoleucylglycylleucylleucylmethionyltyrosylalanylasparaginylleucylvalyl- phenylalanylasparaginyllysylglycylisoleucylaspartylglutamylphenylalanyl- tyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylseryl- valylleucylvalylalanylaspartylvalylprolylvalylglutaminylglutamylseryl- alanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidyl- asparaginylvalylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolyl- prolylaspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminyl- isoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucyl- leucylserylarginylalanylglycylvalylthreonylglycylalanylglutamylasparaginyl- arginylalanylalanylleucylprolylleucylasparaginylhistidylleucylvalylalanyl- lysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucyl- glutaminylglycylphenylalanylglycylisoleucylserylalanylprolylaspartyl- glutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanyl- glycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucyl- isoleucylglutamylglutaminylhistidylasparaginylisoleucylglutamylprolyl- glutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylvalyl- glutaminylprolylmethionyllysylalanylalanylthreonylarginylserine

Compare Longest word in the English language.