Conditions that can cause a temporary rise in the levels of protein in urine, but don't necessarily indicate kidney damage, include: 1  Dehydration. 2  Emotional stress. 3  Exposure to extreme cold. 4  Fever. Strenuous exercise.
http://www.mayoclinic.org/symptoms/protein-in-urine/basics/causes/SYM-20050656
Major urinary proteins (Mups), also known as α2u-globulins, are a subfamily of proteins found in abundance in the urine and other secretions of many animals. Mups provide a small range of identifying information about the donor animal, when detected by the vomeronasal organ of the receiving animal.
https://en.wikipedia.org/wiki/Major_urinary_proteins
Types of proteinuria. Transient proteinuria is the temporary excretion of protein and can be caused by strenuous exercise, a high fever, exposure to cold, stress and other conditions. Pregnant women may also excrete more protein in their urine. Transient proteinuria does not involve underlying kidney disease and requires no treatment.
https://www.davita.com/kidney-disease/overview/assessing-your-risk/proteinuria/e/7463
The test for protein in the urine measures the amount of albumin in your urine, compared to the amount of creatinine in your urine. This is called the urine albumin-to-creatinine ratio (UACR). A UACR more than 30 mg/g can be a sign of kidney disease.
http://www.kidneyfund.org/kidney-disease/kidney-problems/protein-in-urine.html
Some screening tests include: 1  Urine protein – detects the presence of any type of protein that may be in the urine. It can be performed alone on a random urine sample or as part of a urinalysis. 2  Urinalysis – an evaluation of a urine sample for several different substances that may be in the urine, including protein.
https://labtestsonline.org/understanding/conditions/proteinuria/start/2
Major urinary proteins. Tertiary structure of a mouse major urinary protein. The protein has eight beta sheets (yellow) arranged in a beta barrel open at one end, with alpha helices (red) at both the amino- and carboxyl termini. The structure is resolved from Protein Data Bank entry 1i04.
https://en.wikipedia.org/wiki/Major_urinary_proteins
Urine protein – detects the presence of any type of protein that may be in the urine. It can be performed alone on a random urine sample or as part of a urinalysis. Urinalysis – an evaluation of a urine sample for several different substances that may be in the urine, including protein.
https://labtestsonline.org/understanding/conditions/proteinuria/start/2
Diseases and conditions that can cause persistently elevated levels of protein in urine, which might indicate kidney disease, include: Amyloidosis (buildup of abnormal proteins in your organs) Certain drugs, such as nonsteroidal anti-inflammatory drugs. Chronic kidney disease. Diabetes.
http://www.mayoclinic.org/symptoms/protein-in-urine/basics/causes/SYM-20050656
Proteinuria can be caused by diseases not involving the kidneys, such as multiple myeloma, a cancer of the plasma cells in the bone marrow. In this case, the blood is flooded with too many proteins that are then filtered into the urine. The condition is known as overflow proteinuria.
https://www.davita.com/kidney-disease/overview/assessing-your-risk/proteinuria/e/7463
A positive result on a screening test may be followed by further urine tests to determine how much protein and what type of protein is being lost in the urine: 1  Urine albumin, 24 hour urine – measures the amount of albumin that is escaping into the urine within that timeframe.
https://labtestsonline.org/understanding/conditions/proteinuria/start/2
what types of protein can be in urine
α2u-globulins types of protein can be in urine. α2u-globulins type of protein can be found in urine. α2u-globulins type of protein can be  found in urine.