Human cathepsin X/Z is a biologically active homodimer.

Dolenc I, Štefe I, Turk D, Taler-Verčič A, Turk B, Turk V, Stoka V
Biochim Biophys Acta Proteins Proteom :140567 (2020 Nov 20)
PMID: 33227497
doi: 10.1016/j.bbapap.2020.140567 		Submitted to SASBDB: 2020 Aug 23
Published in SASBDB:

SASDJQ7 – Human Cathepsin X

Cathepsin Z experimental SAS data
PDB (PROTEIN DATA BANK) model
Sample: Cathepsin Z dimer, 54 kDa Homo sapiens protein
Buffer: 20 mM sodium acetate, 1 mM EDTA, pH: 5.5
Experiment: SAXS data collected at EMBL P12, PETRA III on 2016 Dec 6
RgGuinier 2.6 nm
Dmax 6.5 nm
VolumePorod 89 nm3