Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Human Gene (Protein) | Mouse Ortholog | Yeast Ortholog | Subpathway | GeneCards Entry |
| --- | --- | --- | --- | --- |
| CCNH ( Cyclin H ) | Ccnh | CCL1 | Both | CCNH |
| CDK7 ( Cyclin Dependent Kinase (CDK) 7) ) | Cdk7 | KIN28 | Both | CDK7 |
| CETN2 (Centrin-2) | Cetn2 | Unknown | GGR | CETN2 |
| DDB1 ( DDB1 ) | Ddb1 | Unknown | GGR | DDB1 |
| DDB2 ( DDB2 ) | Ddb2/Xpe | Unknown | GGR | DDB2 |
| ERCC1 ( ERCC1 ) | Ercc1 | RAD10 | Both | ERCC1 |
| ERCC2 ( XPD ) | Ercc2 | RAD3 | Both | ERCC2 |
| ERCC3 ( XPB ) | Ercc3 | RAD25 | Both | ERCC3 |
| ERCC4 ( XPF ) | Ercc4 | RAD1 | Both | ERCC4 |
| ERCC5 ( XPG ) | Ercc5 | RAD2 | Both | ERCC5 |
| ERCC6 ( CSB ) | Ercc6 | RAD26 | TC-NER | ERCC6 |
| ERCC8 ( CSA ) | Ercc8 | RAD28 | TC-NER | ERCC8 |
| LIG1 ( DNA Ligase I ) | Lig1 | CDC9 | Both | LIG1 |
| MNAT1 ( MNAT1 ) | Mnat1 | TFB3 | Both | MNAT1 |
| MMS19 ( MMS19 ) | Mms19 | MET18 | Both | MMS19 |
| RAD23A ( RAD23A ) | Rad23a | RAD23 | GGR | RAD23A |
| RAD23B ( RAD23B ) | Rad23b | RAD23 | GGR | RAD23B |
| RPA1 ( RPA1 ) | Rpa1 | RFA1 | Both | RPA1 |
| RPA2 ( RPA2 ) | Rpa2 | RFA2 | Both | RPA2 |
| TFIIH ( Transcription factor II H ) | Unknown | Unknown | Both | No GeneCards |
| XAB2 ( XAB2 ) | Xab2 | SYF1 | TC-NER | XAB2 |
| XPA ( XPA ) | Xpa | RAD14 | Both | XPA |
| XPC ( XPC ) | Xpc | RAD4 | GGR | XPC |
Question:
What is the human gene that has a mouse ortholog of LIG1?
Answer:
LIG1 ( DNA Ligase I )