[Variability of pheomelanin content in wool of Karakul lambs and the problem of phenetics of color]. / Izmenchivost' soderzhaniia feomelanina v volosakh Karakul'skikh iagniat i problemy fenetiki okraski.

In samples of wool from 1,229 differently colored newborn Astrakhan lambs, the total content of melanins and the proportion of pheomelanin in the total melanin were studied by the method of electron magnetic resonance spectometry. An analysis of the corresponding computer data base revealed that the distribution of the samples with respect to the proportion of pheomelanin had at least four characteristic maximums; 1-6, 9-10, 28-29, and 39% of pheomelanin. The former two maximums were characteristic for the brown and Karakalpak sur colors, and the latter two maximums, for red-brown kambar color. White hair tips, characteristic for the sur color, and the proportion of pheomelanin were combined almost independently; therefore the possibility is discussed of classifying these characters as independent phenes, and some variants of sur, as their combinations.

[Cellular interrelationships of the outer root sheath of the hair follicle]. / Vzaimootnosheniia kletok naruzhnogo kornevogo vlagalishcha volosianogo follikula.

The 3H-thymidine labelling has demonstrated that into the internal (accompanying) layer of the outer root sheath (ORS) of the hain follicle the cells incorporate not only in the bulb but above it from the external layers of the ORS. Polymorphism of the ORS cells has been revealed electron microscopically; it can be interpreted as a result of transfer of some motionless, greatly vacuolized, containing a lot of glycogen cells to the cells with electron opaque cytoplasm, radially elongated and moving deep into up to their contact with the internal root sheath. The presence in the external layer of the ORS, at the level of the bulb and above it, some nonlabelled cells even 3 days after 3H-thymidine administration demonstrates against their origin from the cambial cells.