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Papain from papaya latex

lyophilized powder, ≥10 units/mg protein

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CAS Number:
Enzyme Commission number:
EC Number:
MDL number:

biological source

papaya (latex)

Quality Level


lyophilized powder

specific activity

≥10 units/mg protein

mol wt

23.4 kDa


cell culture | mammalian: suitable
single cell analysis: suitable


diagnostic assay manufacturing

storage temp.


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General description

Papain is a cysteine protease, found in Carica papaya. It is composed of a single polypeptide chain containing three disulfide bridges and a sulfhydryl group.


Papain from papaya latex has been used:
  • to digest carotid artery smooth muscle cells
  • in dissecting solutions
  • to produce Fab fragments of antibodies
  • for cell dissociation since it has been shown to be more effective and less damaging with certain tissues
  • in the enzyme cocktail for dissociating human fetal retinal tissue
  • to digest chondrocytes/scaffold cultures for total DNA quantification for cell proliferation
  • as a supplement in neurobasal medium to produce retinal cell suspensions
Suitable for use in preparation of single cell suspension for sequencing.
Used to produce Fab fragments of antibodies. Also used for cell dissociation since it has been shown to be more effective and less damaging with certain tissues.

Biochem/physiol Actions

Papain with wide specificity, cleaves peptide bonds of basic amino acids, leucine or glycine. It also hydrolyzes esters and amides. Papain is considered to digest protein substrates more broadly than the pancreatic proteases. Papain is commonly used in cell isolation procedures as it is highly efficient and less harmful than other proteases on certain tissues. The use of papain is known to yield more viable smooth muscle cells, retaining the cell′s sensitivity to stimulants. Papain papaya latex has antifungal activity against C. albicans and is a cysteine protease.
  • The pH optimum is 6.0-7.0
  • Papain hydrolyzes esters and amides
A cysteine protease that cleaves peptide bonds of basic amino acids, leucine, or glycine.
pH optimum 6.0-7.0
Also hydrolyzes esters and amides.


Package size based on protein content

Unit Definition

One unit will hydrolyze 1.0 micromole of N-alpha-benzoyl-L-arginine ethyl ester (BAEE) per minute at pH 6.2 at 25 deg C.

Physical form

Lyophilized powder containing sodium acetate

Preparation Note

2× Crystallized


Exclamation markHealth hazard



Hazard Classifications

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3


Respiratory system

Storage Class

11 - Combustible Solids




Not applicable


Not applicable


dust mask type N95 (US), Eyeshields, Faceshields, Gloves

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