The "lac" repressor is a DNA-binding protein which inhibits the expression of genes coding for proteins involved in the metabolism of lactose in bacteria.
 These genes are repressed when lactose is not available to the cell, ensuring that the bacterium only invests energy in the production of machinery necessary for uptake and utilization of lactose when lactose is present.
 When lactose becomes available, it is converted into allolactose, which inhibits the "lac" repressor's DNA binding ability.
 Loss of DNA binding by the "lac" repressor is required for transcriptional activation of the operon.
Ultrafiltered milk (UF milk), also known as diafiltered milk, is a subclassification of milk protein concentrate that is produced by passing milk under pressure through a thin, porous membrane to separate the components of milk according to their size.
 Specifically, ultra filtration allows the smaller lactose, water, mineral, and vitamin molecules to pass through the membrane, while the larger protein and fat molecule (key components for making cheese) are retained and concentrated.
 (Depending on the intended use of the UF milk product, the fat in whole milk may be removed before filtration.)
 The removal of water and lactose reduces the volume of milk, and thereby lowers its transportation and storage costs.
 Ultrafiltration makes cheese manufacturing more efficient and can benefit consumers if cost savings are passed on.
 However, U.S. milk producers are concerned that imported UF milk may displace domestically produced milk used to make cheese.
Vegan cheese is a non-dairy or plant cheese analogue aimed at vegans and other people who want to avoid animal products, including those who are lactose-intolerant.
 As with plant milk, vegan cheese can be made from cashews, sesame seeds, soybeans, coconut oil, rice, almonds and other nuts, and nutritional yeast.
Lactase persistence is the continued activity of the lactase enzyme in adulthood.
 Since lactase's only function is the digestion of lactose in milk, in most mammal species, the activity of the enzyme is dramatically reduced after weaning.
 In some human populations, though, lactase persistence has recently evolved as an adaptation to the consumption of nonhuman milk and dairy products beyond infancy.
 The majority of people around the world remain lactase nonpersistent, and consequently are affected by varying degrees of lactose intolerance as adults.
 However, not all genetically lactase nonpersistent individuals are noticeably lactose intolerant, and not all lactose intolerant individuals have the lactase nonpersistence genotype.
Vitamin B deficiency is the medical condition of low blood levels of vitamin B.
 A wide variety of signs and symptoms may occur including a decreased ability to think and behavioural and emotional changes such as depression, irritability, and psychosis.
 Abnormal sensations, changes in reflexes, and poor muscle function can also occur as may inflammation of the tongue, decreased taste, low red blood cells, reduced heart function, and decreased fertility.
 In young children symptoms include poor growth, poor development, and difficulties with movement.
 Without early treatment some of the changes may be permanent.
Color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color.
 Color blindness can make some educational activities difficult.
 Buying fruit, picking clothing, and reading traffic lights can be more challenging, for example.
 Problems, however, are generally minor and most people adapt.
 People with total color blindness, however, may also have decreased visual acuity and be uncomfortable in bright environments.
Visual impairment, also known as vision impairment or vision loss, is a decreased ability to see to a degree that causes problems not fixable by usual means, such as glasses.
 Some also include those who have a decreased ability to see because they do not have access to glasses or contact lenses.
 Visual impairment is often defined as a best corrected visual acuity of worse than either 20/40 or 20/60.
 The term blindness is used for complete or nearly complete vision loss.
 Visual impairment may cause people difficulties with normal daily activities such as driving, reading, socializing, and walking.
Lactose intolerance is a condition in which people have symptoms due to the decreased ability to digest lactose, a sugar found in milk products.
 Those affected vary in the amount of lactose they can tolerate before symptoms develop.
 Symptoms may include abdominal pain, bloating, diarrhea, gas, and nausea.
 These typically start between one half and two hours after drinking milk or eating milk products.
 Severity depends on the amount a person eats or drinks.
 It does not cause damage to the gastrointestinal tract.
MacConkey agar is a selective and differential culture medium for bacteria designed to selectively isolate Gram-negative and enteric (normally found in the intestinal tract) bacilli and differentiate them based on lactose fermentation.
 The crystal violet and bile salts inhibit the growth of gram-positive organisms which allows for the selection and isolation of gram-negative bacteria.
 Enteric bacteria that have the ability to ferment lactose can be detected using the carbohydrate lactose, and the pH indicator neutral red.
Caravane is the brand name of a camel milk cheese produced in Mauritania by Tiviski, a company founded by Nancy Abeiderrhamane in 1987.
 The milk used to make the cheese is collected from the local animals of a thousand nomadic herdsmen, is very difficult to produce, and yields a product that is low in lactose.
 As Mauritanians do not generally eat cheese, and the European Commission has not yet fully implemented policies designed for dromedary milk products, Caravane is difficult to find in Europe.
 Its availability is largely limited to Nouakchott shops and restaurants, and as an export to neighboring Senegal.
 It can now be purchased in select stores in New York.

Question: What kind of cheese can people who have the decreased ability to digest lactose eat?
Answer: Vegan cheese