| Date | 1900 |
| Author | Neuberg |
| Contribution | Reported that yeast ferments glucose to make ethanol in a series of biochemical steps. |
| Reference | Anon. |
| Notes | He realized that each step required its own enzyme -- as opposed to Buchner's concept of a single enzyme (zymase, see 1897). The process of microbial metabolism was later shown to be even more complex. |
| Category | Miscellany |
| Pathogen Class | General |
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