Gene Relationship
GET /api/genes/SCUBE2/relationships/genecombination_set?format=api
{
    "data": [
        {
            "type": "GeneCombination",
            "id": "471"
        },
        {
            "type": "GeneCombination",
            "id": "472"
        },
        {
            "type": "GeneCombination",
            "id": "609"
        },
        {
            "type": "GeneCombination",
            "id": "913"
        }
    ]
}