Calpain 2 Large Subunit (M-type) Antibody

About the Target

Calpains are a family of calcium-dependent intracellular thiol proteases involved in diverse molecular, cellular, and physiological processes. In mammals, the two ubiquitously expressed isoforms are calpain-1 (μ-calpain) and calpain-2 (m-calpain). Both function as heterodimers, consisting of a unique large catalytic subunit of ~80 kDa-encoded by CAPN1 for calpain-1 and CAPN2 for calpain-2-and a shared small regulatory subunit of ~28 kDa encoded by CAPNS1 (also known as CAPN4). Depending on the literature source, CAPN2 may also be discussed as Calpain 2 Large Subunit (M-type) and Calpain-2 catalytic subunit.

Reported cellular context includes cell membrane, cytoplasm, and membrane, which can matter when signal is compared across treatments or changing cell states. Following CAPN2 across matched perturbations can help separate abundance effects from shifts in localization, complex assembly, or pathway state.

Research Context

CAPN2 is commonly interpreted in the context of cancer and neuroscience research, and readouts are often stronger when a study separates expression changes from compartment-level redistribution. When reported signal spans cell membrane, cytoplasm, and membrane, a defined reference condition can make comparisons more interpretable across perturbations, passages, or replicate sets.

Consider these angles when interpreting target-level changes:

• apparent redistribution between cell membrane, cytoplasm, and membrane across matched conditions
• changes associated with proliferative state, oncogenic signaling, or treatment response
• compartment-specific patterns relevant to neuronal polarity, transport, or synaptic context
• co-patterning with orthogonal markers and control conditions that clarify pathway state

Variant Considerations

If your project spans exploratory questions, the regular version offers a balanced option for establishing baseline signal behavior for CAPN2. This can help when protocols evolve over time and the goal is to compare experiments using a stable reference workflow.

Standardize sampling time, control choice, and downstream analysis thresholds so apparent differences in CAPN2 reflect biology rather than handling. When interpreting CAPN2, it is often useful to decide early whether the main question is overall abundance, compartmental enrichment, or context-dependent redistribution.

For multi-run studies, a shared reference condition can keep CAPN2 trends easier to compare across datasets. That kind of consistency is especially helpful when follow-up work expands to new perturbations, model systems, or longitudinal collections.