Target

RRM1

Ribonucleoside-diphosphate reductase large subunit

As of the edition of 20 October 2026, RRM1 (ribonucleoside-diphosphate reductase large subunit, UniProt P23921) has 9 drugs tested at it and 17 companies on the list, 2 on route A and 2 on route B.

Sources: UniProt, ClinicalTrials.gov, ChEMBL, FDA Orange Book and Purple Book, Pharos.

The protein

UniProt
P23921
How well studied
Drug target: an approved drug acts on it
Where it sits in the cell
Inside the cell
Solved structures
12
Disease areas
Cancer; Digestive system; Hormones; Blood and lymph; Immune system; Lungs and airways; Urinary and reproductive; Pregnancy and women's health
Registered trials of its drugs
3,026

Drugs at this target

StatusCount
Marketed4
Active2
Went quiet1
Stopped2
Total9
DrugStatusFurthest phaseUS protection
GemcitabineMarketedPhase 4none listed
Fludarabine phosphateMarketedPhase 4none listed
ClofarabineMarketedPhase 3none listed
Motexafin gadoliniumStoppedPhase 3none listed
TriapineStoppedPhase 3none listed
TAR-200ActivePhase 3none listed
Gallium citrateMarketedPhase 3none listed
Tezacitabine anhydrousWent quietPhase 2none listed
FF-10832ActivePhase 2none listed

9 of 9 drugs, the most tested first.

Companies at this target

Where the company standsCompanies
Route A2
Route B2
Engaged8
Undetermined5
Total on the list17
Three companies on route A or B, with the route only
CompanyRoute
PfizerRoute B
NovartisRoute A
BayerRoute B

The other 14 companies at RRM1

In the product

17 companies in all; 14 are not named here, and no score is.

See the 17 companies at RRM1, ranked, with the facts behind eachRequest access. Nothing is shown until you do.