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Biomedical subjects

L Huacuja

Publications and source records attributed to L Huacuja.

20 records · Page 2Linked to original sources

[Follicular maturation in the swine. Changes in the protein secretion pattern during follicular growth].

The formation of fluid, maturation and follicular differentiation are physiological processes unknown to this date. Therefore, changes in the electrophoretic pattern of proteins and glycoproteins in different states of maturation were studied, as well as the volume and protein concentration. Follicular fluid was collected from 43 follicles with a diameter of 2 mm., 45 follicles with a diameter of 5 mm. and 49 of 9 mm. The average of the concentration of protein for the 2 mm. follicles was 106 +/- 56.3 mg/ml of follicular fluid, for the 5 mm. ones 68.3 +/- 37.1 mg/ml and the 9 mm. ones had 52.9 +/- 21.3 mg/ml. In the protein and glycoproteins characterized by electrophoresis, a consistent pattern of 3 bands was found, and none were PAS positive in the 2 mm. follicles. In the 5 mm. follicles a 10 band pattern was found, of which 1 was PAS positive. In the last plane, the 9 mm. pattern was 12 and 2 respectively. The average value of follicular fluid was 5.3 +/- 1.8 microliters, for the 5 and 9 mm. it was 57 mu 25 microliters and 190 +/- 77 microliters respectively. Statistical analysis between volume and size show a highly significant correlation, thus suggesting the use of one of them to extrapolate the other.

Animals↗

[Characterization of SH groups in the membrane proteins of human spermatozoa].

Membrane proteins rich in SH- groups were identified in human ejaculated spermatozoon, using the alkylation reaction with radioactive iodoacetic acid with a subsequent determination of the electrophoretic characterization of the proteins, as well as their comparison with the proteins in seminal plasma and blood serum of the same individuals. The determination of the incorporated radioactivity shows that out of 20 proteic bands identified by staining with Coomassie Blue, only 9 were alkylated with the iodoacetate. Among these 9 proteic bands, 4 are glycoproteins since they give a PAS positive reaction. All the proteins which incorporated the marked iodoacetate had a molecular weight below 67,000 daltons with a predominance of molecular weight below 25,000 daltons. A comparison of the electrophoresis obtained from the spermatozoon's plasmatic membrane, seminal plasma and blood serum, one finds that among the 9 proteins which were alkylated with the iodoacetate in the plasmatic membranes, two, bands I and IV are also found in the seminal plasma and blood serum, two more, bands VII and IX are found in the membranes and seminal plasma, but not in blood serum, while the rest are only found in the spermatozoon.

Blood Proteins↗