Philippine long-tailed macaque Philippine long-tailed macaque The Philippine long-tailed macaque ("Macaca fascicularis philippensis") is a subspecies of the crab-eating macaque, known in various Philippine languages as "matching"/"matsing" or the more general term "unggoy" ("monkey"). It is endemic in the Philippine forests and woodlands, but especially in the mangrove forests of western central Philippines— particularly in Palawan, the Visayas, and Mindanao. The names "M. f. philippinensis" or even "M. f. philippinenesis" have also been used, but arise from orthographical error. The Philippine long-tailed macaque has a reddish-brown coat. Its tail has an average length of 50 cm to 60 cm. It can reach a
Rhesus macaque significance because the macaque is used as an experimental model of the human immune system. In humans, the preferentially expressed antigen of melanoma (PRAME) gene family is expanded. It is actively expressed in cancers, but normally is testis-specific, possibly involved in spermatogenesis. The PRAME family has 26 members on human chromosome 1. In the macaque, it has eight, and has been very simple and stable for millions of years. The PRAME family arose in translocations in the common mouse-primate ancestor 85 million years ago, and is expanded on mouse chromosome 4. DNA microarrays are used in macaque research. For example,