There are four human-specific NOTCH2NL genes: NOTCH2NLA, NOTCH2NLB and NOTCH2NLC, located on 1q21.1, and NOTCH2NLR located on 1p11.2. While chimpanzee and gorilla have copies of NOTCH2NL, none are functional.
Humans possess four unique NOTCH2NL genes (NOTCH2NLA, NOTCH2NLB, NOTCH2NLC, and NOTCH2NLR) found on chromosomes 1q21.1 and 1p11.2.  Chimpanzees and gorillas have these genes but they are not functional.