Yenzym Antibodies LLC
337 Littlefield Ave, South San Francisco, CA 94080
Present in a source dataset, with no recent operating signal.
What they make
Biological Product (except Diagnostic) Manufacturing325414- custom antibody services
- GPCR
- channel proteins
- investigators
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Products
Recorded against the company rather than this address. Federal award and drug records name the company, not the plant, so we cannot say which of its sites makes these.
Where these came from
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Twist Bioscience | South San Francisco | Biological Product (except Diagnostic) Manufacturing 325414 | UNVERIFIED | 0.2 KM |
| Janssen Research & Development LLC | South San Francisco | Biological Product (except Diagnostic) Manufacturing 325414 | REPORTED CLOSED | 0.5 KM |
| Coherus Biosciences | South San Francisco | Biological Product (except Diagnostic) Manufacturing 325414 | UNVERIFIED | 0.5 KM |
| Abbvie Stemcentrx LLC | South San Francisco | Biological Product (except Diagnostic) Manufacturing 325414 | UNVERIFIED | 0.8 KM |
| Cell Genesys | S San Francisco | Biological Product (except Diagnostic) Manufacturing 325414 | LIKELY ACTIVE | 1.1 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
1 source holds this plant, and 7 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
EPA cross-references this facility in RCRAINFO · EPA site type STATIONARY.
- EPA Facility Registry ServiceEXISTENCERecord 110070481351 · first seen JAN 2019 · last seen JAN 2019
IN SAN MATEO COUNTY207 other plants share this one’s industry (Pharmaceutical and Medicine Manufacturing, NAICS 3254); 7 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- EPA: YENZYM ANTIBODIES LLC · NOV 2026
- Street address
- EPA: 337 LITTLEFIELD AVE · NOV 2026
- City
- EPA: SOUTH SAN FRANCISCO · NOV 2026
- State
- EPA: CA · NOV 2026
- County (FIPS code)
- EPA: 06081 · NOV 2026
- Coordinates
- EPA: 37.64858,-122.39447 · NOV 2026
- Hazardous waste generator (RCRA)
- EPA ECHO: none · NOV 2026