| mRNA IDs | Primary Information | |
| NM_005356.3 | Gene Symbol | LCK |
| Protein Name | Lymphocyte-specific protein tyrosine kinase | |
| Alternate Names | YT16, p56lck, pp58lck | |
| Gene Locus | 1p34.3 | |
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| Disease name | Characteristic / Associated features | Category | inheritance type |
| p56 Lck deficiency | Idiopathic CD4-positive T-lymphocytopenia; reduced production of p56lck protein; failure to thrive; opportunistic infections; Absent or severely reduced levels of serum immunoglobulins; T-lymphocyte deficiency | Combined T-cell and B-cell immunodeficiencies | Autosomal recessive |